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1 | # encoding: utf-8 |
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1 | # encoding: utf-8 | |
2 | """ |
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2 | """Tests for IPython.utils.traitlets.""" | |
3 | Tests for IPython.utils.traitlets. |
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4 |
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3 | |||
5 | Authors: |
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4 | # Copyright (c) IPython Development Team. | |
6 |
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5 | # Distributed under the terms of the Modified BSD License. | ||
7 | * Brian Granger |
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6 | # | |
8 | * Enthought, Inc. Some of the code in this file comes from enthought.traits |
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7 | # Adapted from enthought.traits, Copyright (c) Enthought, Inc., | |
9 | and is licensed under the BSD license. Also, many of the ideas also come |
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8 | # also under the terms of the Modified BSD License. | |
10 | from enthought.traits even though our implementation is very different. |
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11 | """ |
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12 |
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13 | #----------------------------------------------------------------------------- |
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14 | # Copyright (C) 2008-2011 The IPython Development Team |
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15 | # |
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16 | # Distributed under the terms of the BSD License. The full license is in |
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17 | # the file COPYING, distributed as part of this software. |
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18 | #----------------------------------------------------------------------------- |
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19 |
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20 | #----------------------------------------------------------------------------- |
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21 | # Imports |
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22 | #----------------------------------------------------------------------------- |
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23 |
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9 | |||
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10 | import pickle | |||
24 | import re |
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11 | import re | |
25 | import sys |
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12 | import sys | |
26 | from unittest import TestCase |
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13 | from unittest import TestCase | |
27 |
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14 | |||
28 | import nose.tools as nt |
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15 | import nose.tools as nt | |
29 | from nose import SkipTest |
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16 | from nose import SkipTest | |
30 |
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17 | |||
31 | from IPython.utils.traitlets import ( |
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18 | from IPython.utils.traitlets import ( | |
32 | HasTraits, MetaHasTraits, TraitType, Any, CBytes, Dict, |
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19 | HasTraits, MetaHasTraits, TraitType, Any, CBytes, Dict, | |
33 | Int, Long, Integer, Float, Complex, Bytes, Unicode, TraitError, |
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20 | Int, Long, Integer, Float, Complex, Bytes, Unicode, TraitError, | |
34 | Undefined, Type, This, Instance, TCPAddress, List, Tuple, |
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21 | Undefined, Type, This, Instance, TCPAddress, List, Tuple, | |
35 | ObjectName, DottedObjectName, CRegExp, link |
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22 | ObjectName, DottedObjectName, CRegExp, link | |
36 | ) |
|
23 | ) | |
37 | from IPython.utils import py3compat |
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24 | from IPython.utils import py3compat | |
38 | from IPython.testing.decorators import skipif |
|
25 | from IPython.testing.decorators import skipif | |
39 |
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26 | |||
40 | #----------------------------------------------------------------------------- |
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27 | #----------------------------------------------------------------------------- | |
41 | # Helper classes for testing |
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28 | # Helper classes for testing | |
42 | #----------------------------------------------------------------------------- |
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29 | #----------------------------------------------------------------------------- | |
43 |
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30 | |||
44 |
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31 | |||
45 | class HasTraitsStub(HasTraits): |
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32 | class HasTraitsStub(HasTraits): | |
46 |
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33 | |||
47 | def _notify_trait(self, name, old, new): |
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34 | def _notify_trait(self, name, old, new): | |
48 | self._notify_name = name |
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35 | self._notify_name = name | |
49 | self._notify_old = old |
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36 | self._notify_old = old | |
50 | self._notify_new = new |
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37 | self._notify_new = new | |
51 |
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38 | |||
52 |
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39 | |||
53 | #----------------------------------------------------------------------------- |
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40 | #----------------------------------------------------------------------------- | |
54 | # Test classes |
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41 | # Test classes | |
55 | #----------------------------------------------------------------------------- |
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42 | #----------------------------------------------------------------------------- | |
56 |
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43 | |||
57 |
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44 | |||
58 | class TestTraitType(TestCase): |
|
45 | class TestTraitType(TestCase): | |
59 |
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46 | |||
60 | def test_get_undefined(self): |
|
47 | def test_get_undefined(self): | |
61 | class A(HasTraits): |
|
48 | class A(HasTraits): | |
62 | a = TraitType |
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49 | a = TraitType | |
63 | a = A() |
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50 | a = A() | |
64 | self.assertEqual(a.a, Undefined) |
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51 | self.assertEqual(a.a, Undefined) | |
65 |
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52 | |||
66 | def test_set(self): |
|
53 | def test_set(self): | |
67 | class A(HasTraitsStub): |
|
54 | class A(HasTraitsStub): | |
68 | a = TraitType |
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55 | a = TraitType | |
69 |
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56 | |||
70 | a = A() |
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57 | a = A() | |
71 | a.a = 10 |
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58 | a.a = 10 | |
72 | self.assertEqual(a.a, 10) |
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59 | self.assertEqual(a.a, 10) | |
73 | self.assertEqual(a._notify_name, 'a') |
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60 | self.assertEqual(a._notify_name, 'a') | |
74 | self.assertEqual(a._notify_old, Undefined) |
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61 | self.assertEqual(a._notify_old, Undefined) | |
75 | self.assertEqual(a._notify_new, 10) |
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62 | self.assertEqual(a._notify_new, 10) | |
76 |
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63 | |||
77 | def test_validate(self): |
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64 | def test_validate(self): | |
78 | class MyTT(TraitType): |
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65 | class MyTT(TraitType): | |
79 | def validate(self, inst, value): |
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66 | def validate(self, inst, value): | |
80 | return -1 |
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67 | return -1 | |
81 | class A(HasTraitsStub): |
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68 | class A(HasTraitsStub): | |
82 | tt = MyTT |
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69 | tt = MyTT | |
83 |
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70 | |||
84 | a = A() |
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71 | a = A() | |
85 | a.tt = 10 |
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72 | a.tt = 10 | |
86 | self.assertEqual(a.tt, -1) |
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73 | self.assertEqual(a.tt, -1) | |
87 |
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74 | |||
88 | def test_default_validate(self): |
|
75 | def test_default_validate(self): | |
89 | class MyIntTT(TraitType): |
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76 | class MyIntTT(TraitType): | |
90 | def validate(self, obj, value): |
|
77 | def validate(self, obj, value): | |
91 | if isinstance(value, int): |
|
78 | if isinstance(value, int): | |
92 | return value |
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79 | return value | |
93 | self.error(obj, value) |
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80 | self.error(obj, value) | |
94 | class A(HasTraits): |
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81 | class A(HasTraits): | |
95 | tt = MyIntTT(10) |
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82 | tt = MyIntTT(10) | |
96 | a = A() |
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83 | a = A() | |
97 | self.assertEqual(a.tt, 10) |
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84 | self.assertEqual(a.tt, 10) | |
98 |
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85 | |||
99 | # Defaults are validated when the HasTraits is instantiated |
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86 | # Defaults are validated when the HasTraits is instantiated | |
100 | class B(HasTraits): |
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87 | class B(HasTraits): | |
101 | tt = MyIntTT('bad default') |
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88 | tt = MyIntTT('bad default') | |
102 | self.assertRaises(TraitError, B) |
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89 | self.assertRaises(TraitError, B) | |
103 |
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90 | |||
104 | def test_is_valid_for(self): |
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91 | def test_is_valid_for(self): | |
105 | class MyTT(TraitType): |
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92 | class MyTT(TraitType): | |
106 | def is_valid_for(self, value): |
|
93 | def is_valid_for(self, value): | |
107 | return True |
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94 | return True | |
108 | class A(HasTraits): |
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95 | class A(HasTraits): | |
109 | tt = MyTT |
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96 | tt = MyTT | |
110 |
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97 | |||
111 | a = A() |
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98 | a = A() | |
112 | a.tt = 10 |
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99 | a.tt = 10 | |
113 | self.assertEqual(a.tt, 10) |
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100 | self.assertEqual(a.tt, 10) | |
114 |
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101 | |||
115 | def test_value_for(self): |
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102 | def test_value_for(self): | |
116 | class MyTT(TraitType): |
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103 | class MyTT(TraitType): | |
117 | def value_for(self, value): |
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104 | def value_for(self, value): | |
118 | return 20 |
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105 | return 20 | |
119 | class A(HasTraits): |
|
106 | class A(HasTraits): | |
120 | tt = MyTT |
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107 | tt = MyTT | |
121 |
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108 | |||
122 | a = A() |
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109 | a = A() | |
123 | a.tt = 10 |
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110 | a.tt = 10 | |
124 | self.assertEqual(a.tt, 20) |
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111 | self.assertEqual(a.tt, 20) | |
125 |
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112 | |||
126 | def test_info(self): |
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113 | def test_info(self): | |
127 | class A(HasTraits): |
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114 | class A(HasTraits): | |
128 | tt = TraitType |
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115 | tt = TraitType | |
129 | a = A() |
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116 | a = A() | |
130 | self.assertEqual(A.tt.info(), 'any value') |
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117 | self.assertEqual(A.tt.info(), 'any value') | |
131 |
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118 | |||
132 | def test_error(self): |
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119 | def test_error(self): | |
133 | class A(HasTraits): |
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120 | class A(HasTraits): | |
134 | tt = TraitType |
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121 | tt = TraitType | |
135 | a = A() |
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122 | a = A() | |
136 | self.assertRaises(TraitError, A.tt.error, a, 10) |
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123 | self.assertRaises(TraitError, A.tt.error, a, 10) | |
137 |
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124 | |||
138 | def test_dynamic_initializer(self): |
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125 | def test_dynamic_initializer(self): | |
139 | class A(HasTraits): |
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126 | class A(HasTraits): | |
140 | x = Int(10) |
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127 | x = Int(10) | |
141 | def _x_default(self): |
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128 | def _x_default(self): | |
142 | return 11 |
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129 | return 11 | |
143 | class B(A): |
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130 | class B(A): | |
144 | x = Int(20) |
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131 | x = Int(20) | |
145 | class C(A): |
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132 | class C(A): | |
146 | def _x_default(self): |
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133 | def _x_default(self): | |
147 | return 21 |
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134 | return 21 | |
148 |
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135 | |||
149 | a = A() |
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136 | a = A() | |
150 | self.assertEqual(a._trait_values, {}) |
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137 | self.assertEqual(a._trait_values, {}) | |
151 | self.assertEqual(list(a._trait_dyn_inits.keys()), ['x']) |
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138 | self.assertEqual(list(a._trait_dyn_inits.keys()), ['x']) | |
152 | self.assertEqual(a.x, 11) |
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139 | self.assertEqual(a.x, 11) | |
153 | self.assertEqual(a._trait_values, {'x': 11}) |
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140 | self.assertEqual(a._trait_values, {'x': 11}) | |
154 | b = B() |
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141 | b = B() | |
155 | self.assertEqual(b._trait_values, {'x': 20}) |
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142 | self.assertEqual(b._trait_values, {'x': 20}) | |
156 | self.assertEqual(list(a._trait_dyn_inits.keys()), ['x']) |
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143 | self.assertEqual(list(a._trait_dyn_inits.keys()), ['x']) | |
157 | self.assertEqual(b.x, 20) |
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144 | self.assertEqual(b.x, 20) | |
158 | c = C() |
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145 | c = C() | |
159 | self.assertEqual(c._trait_values, {}) |
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146 | self.assertEqual(c._trait_values, {}) | |
160 | self.assertEqual(list(a._trait_dyn_inits.keys()), ['x']) |
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147 | self.assertEqual(list(a._trait_dyn_inits.keys()), ['x']) | |
161 | self.assertEqual(c.x, 21) |
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148 | self.assertEqual(c.x, 21) | |
162 | self.assertEqual(c._trait_values, {'x': 21}) |
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149 | self.assertEqual(c._trait_values, {'x': 21}) | |
163 | # Ensure that the base class remains unmolested when the _default |
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150 | # Ensure that the base class remains unmolested when the _default | |
164 | # initializer gets overridden in a subclass. |
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151 | # initializer gets overridden in a subclass. | |
165 | a = A() |
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152 | a = A() | |
166 | c = C() |
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153 | c = C() | |
167 | self.assertEqual(a._trait_values, {}) |
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154 | self.assertEqual(a._trait_values, {}) | |
168 | self.assertEqual(list(a._trait_dyn_inits.keys()), ['x']) |
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155 | self.assertEqual(list(a._trait_dyn_inits.keys()), ['x']) | |
169 | self.assertEqual(a.x, 11) |
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156 | self.assertEqual(a.x, 11) | |
170 | self.assertEqual(a._trait_values, {'x': 11}) |
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157 | self.assertEqual(a._trait_values, {'x': 11}) | |
171 |
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158 | |||
172 |
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159 | |||
173 |
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160 | |||
174 | class TestHasTraitsMeta(TestCase): |
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161 | class TestHasTraitsMeta(TestCase): | |
175 |
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162 | |||
176 | def test_metaclass(self): |
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163 | def test_metaclass(self): | |
177 | self.assertEqual(type(HasTraits), MetaHasTraits) |
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164 | self.assertEqual(type(HasTraits), MetaHasTraits) | |
178 |
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165 | |||
179 | class A(HasTraits): |
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166 | class A(HasTraits): | |
180 | a = Int |
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167 | a = Int | |
181 |
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168 | |||
182 | a = A() |
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169 | a = A() | |
183 | self.assertEqual(type(a.__class__), MetaHasTraits) |
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170 | self.assertEqual(type(a.__class__), MetaHasTraits) | |
184 | self.assertEqual(a.a,0) |
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171 | self.assertEqual(a.a,0) | |
185 | a.a = 10 |
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172 | a.a = 10 | |
186 | self.assertEqual(a.a,10) |
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173 | self.assertEqual(a.a,10) | |
187 |
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174 | |||
188 | class B(HasTraits): |
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175 | class B(HasTraits): | |
189 | b = Int() |
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176 | b = Int() | |
190 |
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177 | |||
191 | b = B() |
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178 | b = B() | |
192 | self.assertEqual(b.b,0) |
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179 | self.assertEqual(b.b,0) | |
193 | b.b = 10 |
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180 | b.b = 10 | |
194 | self.assertEqual(b.b,10) |
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181 | self.assertEqual(b.b,10) | |
195 |
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182 | |||
196 | class C(HasTraits): |
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183 | class C(HasTraits): | |
197 | c = Int(30) |
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184 | c = Int(30) | |
198 |
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185 | |||
199 | c = C() |
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186 | c = C() | |
200 | self.assertEqual(c.c,30) |
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187 | self.assertEqual(c.c,30) | |
201 | c.c = 10 |
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188 | c.c = 10 | |
202 | self.assertEqual(c.c,10) |
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189 | self.assertEqual(c.c,10) | |
203 |
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190 | |||
204 | def test_this_class(self): |
|
191 | def test_this_class(self): | |
205 | class A(HasTraits): |
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192 | class A(HasTraits): | |
206 | t = This() |
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193 | t = This() | |
207 | tt = This() |
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194 | tt = This() | |
208 | class B(A): |
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195 | class B(A): | |
209 | tt = This() |
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196 | tt = This() | |
210 | ttt = This() |
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197 | ttt = This() | |
211 | self.assertEqual(A.t.this_class, A) |
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198 | self.assertEqual(A.t.this_class, A) | |
212 | self.assertEqual(B.t.this_class, A) |
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199 | self.assertEqual(B.t.this_class, A) | |
213 | self.assertEqual(B.tt.this_class, B) |
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200 | self.assertEqual(B.tt.this_class, B) | |
214 | self.assertEqual(B.ttt.this_class, B) |
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201 | self.assertEqual(B.ttt.this_class, B) | |
215 |
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202 | |||
216 | class TestHasTraitsNotify(TestCase): |
|
203 | class TestHasTraitsNotify(TestCase): | |
217 |
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204 | |||
218 | def setUp(self): |
|
205 | def setUp(self): | |
219 | self._notify1 = [] |
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206 | self._notify1 = [] | |
220 | self._notify2 = [] |
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207 | self._notify2 = [] | |
221 |
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208 | |||
222 | def notify1(self, name, old, new): |
|
209 | def notify1(self, name, old, new): | |
223 | self._notify1.append((name, old, new)) |
|
210 | self._notify1.append((name, old, new)) | |
224 |
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211 | |||
225 | def notify2(self, name, old, new): |
|
212 | def notify2(self, name, old, new): | |
226 | self._notify2.append((name, old, new)) |
|
213 | self._notify2.append((name, old, new)) | |
227 |
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214 | |||
228 | def test_notify_all(self): |
|
215 | def test_notify_all(self): | |
229 |
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216 | |||
230 | class A(HasTraits): |
|
217 | class A(HasTraits): | |
231 | a = Int |
|
218 | a = Int | |
232 | b = Float |
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219 | b = Float | |
233 |
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220 | |||
234 | a = A() |
|
221 | a = A() | |
235 | a.on_trait_change(self.notify1) |
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222 | a.on_trait_change(self.notify1) | |
236 | a.a = 0 |
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223 | a.a = 0 | |
237 | self.assertEqual(len(self._notify1),0) |
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224 | self.assertEqual(len(self._notify1),0) | |
238 | a.b = 0.0 |
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225 | a.b = 0.0 | |
239 | self.assertEqual(len(self._notify1),0) |
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226 | self.assertEqual(len(self._notify1),0) | |
240 | a.a = 10 |
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227 | a.a = 10 | |
241 | self.assertTrue(('a',0,10) in self._notify1) |
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228 | self.assertTrue(('a',0,10) in self._notify1) | |
242 | a.b = 10.0 |
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229 | a.b = 10.0 | |
243 | self.assertTrue(('b',0.0,10.0) in self._notify1) |
|
230 | self.assertTrue(('b',0.0,10.0) in self._notify1) | |
244 | self.assertRaises(TraitError,setattr,a,'a','bad string') |
|
231 | self.assertRaises(TraitError,setattr,a,'a','bad string') | |
245 | self.assertRaises(TraitError,setattr,a,'b','bad string') |
|
232 | self.assertRaises(TraitError,setattr,a,'b','bad string') | |
246 | self._notify1 = [] |
|
233 | self._notify1 = [] | |
247 | a.on_trait_change(self.notify1,remove=True) |
|
234 | a.on_trait_change(self.notify1,remove=True) | |
248 | a.a = 20 |
|
235 | a.a = 20 | |
249 | a.b = 20.0 |
|
236 | a.b = 20.0 | |
250 | self.assertEqual(len(self._notify1),0) |
|
237 | self.assertEqual(len(self._notify1),0) | |
251 |
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238 | |||
252 | def test_notify_one(self): |
|
239 | def test_notify_one(self): | |
253 |
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240 | |||
254 | class A(HasTraits): |
|
241 | class A(HasTraits): | |
255 | a = Int |
|
242 | a = Int | |
256 | b = Float |
|
243 | b = Float | |
257 |
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244 | |||
258 | a = A() |
|
245 | a = A() | |
259 | a.on_trait_change(self.notify1, 'a') |
|
246 | a.on_trait_change(self.notify1, 'a') | |
260 | a.a = 0 |
|
247 | a.a = 0 | |
261 | self.assertEqual(len(self._notify1),0) |
|
248 | self.assertEqual(len(self._notify1),0) | |
262 | a.a = 10 |
|
249 | a.a = 10 | |
263 | self.assertTrue(('a',0,10) in self._notify1) |
|
250 | self.assertTrue(('a',0,10) in self._notify1) | |
264 | self.assertRaises(TraitError,setattr,a,'a','bad string') |
|
251 | self.assertRaises(TraitError,setattr,a,'a','bad string') | |
265 |
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252 | |||
266 | def test_subclass(self): |
|
253 | def test_subclass(self): | |
267 |
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254 | |||
268 | class A(HasTraits): |
|
255 | class A(HasTraits): | |
269 | a = Int |
|
256 | a = Int | |
270 |
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257 | |||
271 | class B(A): |
|
258 | class B(A): | |
272 | b = Float |
|
259 | b = Float | |
273 |
|
260 | |||
274 | b = B() |
|
261 | b = B() | |
275 | self.assertEqual(b.a,0) |
|
262 | self.assertEqual(b.a,0) | |
276 | self.assertEqual(b.b,0.0) |
|
263 | self.assertEqual(b.b,0.0) | |
277 | b.a = 100 |
|
264 | b.a = 100 | |
278 | b.b = 100.0 |
|
265 | b.b = 100.0 | |
279 | self.assertEqual(b.a,100) |
|
266 | self.assertEqual(b.a,100) | |
280 | self.assertEqual(b.b,100.0) |
|
267 | self.assertEqual(b.b,100.0) | |
281 |
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268 | |||
282 | def test_notify_subclass(self): |
|
269 | def test_notify_subclass(self): | |
283 |
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270 | |||
284 | class A(HasTraits): |
|
271 | class A(HasTraits): | |
285 | a = Int |
|
272 | a = Int | |
286 |
|
273 | |||
287 | class B(A): |
|
274 | class B(A): | |
288 | b = Float |
|
275 | b = Float | |
289 |
|
276 | |||
290 | b = B() |
|
277 | b = B() | |
291 | b.on_trait_change(self.notify1, 'a') |
|
278 | b.on_trait_change(self.notify1, 'a') | |
292 | b.on_trait_change(self.notify2, 'b') |
|
279 | b.on_trait_change(self.notify2, 'b') | |
293 | b.a = 0 |
|
280 | b.a = 0 | |
294 | b.b = 0.0 |
|
281 | b.b = 0.0 | |
295 | self.assertEqual(len(self._notify1),0) |
|
282 | self.assertEqual(len(self._notify1),0) | |
296 | self.assertEqual(len(self._notify2),0) |
|
283 | self.assertEqual(len(self._notify2),0) | |
297 | b.a = 10 |
|
284 | b.a = 10 | |
298 | b.b = 10.0 |
|
285 | b.b = 10.0 | |
299 | self.assertTrue(('a',0,10) in self._notify1) |
|
286 | self.assertTrue(('a',0,10) in self._notify1) | |
300 | self.assertTrue(('b',0.0,10.0) in self._notify2) |
|
287 | self.assertTrue(('b',0.0,10.0) in self._notify2) | |
301 |
|
288 | |||
302 | def test_static_notify(self): |
|
289 | def test_static_notify(self): | |
303 |
|
290 | |||
304 | class A(HasTraits): |
|
291 | class A(HasTraits): | |
305 | a = Int |
|
292 | a = Int | |
306 | _notify1 = [] |
|
293 | _notify1 = [] | |
307 | def _a_changed(self, name, old, new): |
|
294 | def _a_changed(self, name, old, new): | |
308 | self._notify1.append((name, old, new)) |
|
295 | self._notify1.append((name, old, new)) | |
309 |
|
296 | |||
310 | a = A() |
|
297 | a = A() | |
311 | a.a = 0 |
|
298 | a.a = 0 | |
312 | # This is broken!!! |
|
299 | # This is broken!!! | |
313 | self.assertEqual(len(a._notify1),0) |
|
300 | self.assertEqual(len(a._notify1),0) | |
314 | a.a = 10 |
|
301 | a.a = 10 | |
315 | self.assertTrue(('a',0,10) in a._notify1) |
|
302 | self.assertTrue(('a',0,10) in a._notify1) | |
316 |
|
303 | |||
317 | class B(A): |
|
304 | class B(A): | |
318 | b = Float |
|
305 | b = Float | |
319 | _notify2 = [] |
|
306 | _notify2 = [] | |
320 | def _b_changed(self, name, old, new): |
|
307 | def _b_changed(self, name, old, new): | |
321 | self._notify2.append((name, old, new)) |
|
308 | self._notify2.append((name, old, new)) | |
322 |
|
309 | |||
323 | b = B() |
|
310 | b = B() | |
324 | b.a = 10 |
|
311 | b.a = 10 | |
325 | b.b = 10.0 |
|
312 | b.b = 10.0 | |
326 | self.assertTrue(('a',0,10) in b._notify1) |
|
313 | self.assertTrue(('a',0,10) in b._notify1) | |
327 | self.assertTrue(('b',0.0,10.0) in b._notify2) |
|
314 | self.assertTrue(('b',0.0,10.0) in b._notify2) | |
328 |
|
315 | |||
329 | def test_notify_args(self): |
|
316 | def test_notify_args(self): | |
330 |
|
317 | |||
331 | def callback0(): |
|
318 | def callback0(): | |
332 | self.cb = () |
|
319 | self.cb = () | |
333 | def callback1(name): |
|
320 | def callback1(name): | |
334 | self.cb = (name,) |
|
321 | self.cb = (name,) | |
335 | def callback2(name, new): |
|
322 | def callback2(name, new): | |
336 | self.cb = (name, new) |
|
323 | self.cb = (name, new) | |
337 | def callback3(name, old, new): |
|
324 | def callback3(name, old, new): | |
338 | self.cb = (name, old, new) |
|
325 | self.cb = (name, old, new) | |
339 |
|
326 | |||
340 | class A(HasTraits): |
|
327 | class A(HasTraits): | |
341 | a = Int |
|
328 | a = Int | |
342 |
|
329 | |||
343 | a = A() |
|
330 | a = A() | |
344 | a.on_trait_change(callback0, 'a') |
|
331 | a.on_trait_change(callback0, 'a') | |
345 | a.a = 10 |
|
332 | a.a = 10 | |
346 | self.assertEqual(self.cb,()) |
|
333 | self.assertEqual(self.cb,()) | |
347 | a.on_trait_change(callback0, 'a', remove=True) |
|
334 | a.on_trait_change(callback0, 'a', remove=True) | |
348 |
|
335 | |||
349 | a.on_trait_change(callback1, 'a') |
|
336 | a.on_trait_change(callback1, 'a') | |
350 | a.a = 100 |
|
337 | a.a = 100 | |
351 | self.assertEqual(self.cb,('a',)) |
|
338 | self.assertEqual(self.cb,('a',)) | |
352 | a.on_trait_change(callback1, 'a', remove=True) |
|
339 | a.on_trait_change(callback1, 'a', remove=True) | |
353 |
|
340 | |||
354 | a.on_trait_change(callback2, 'a') |
|
341 | a.on_trait_change(callback2, 'a') | |
355 | a.a = 1000 |
|
342 | a.a = 1000 | |
356 | self.assertEqual(self.cb,('a',1000)) |
|
343 | self.assertEqual(self.cb,('a',1000)) | |
357 | a.on_trait_change(callback2, 'a', remove=True) |
|
344 | a.on_trait_change(callback2, 'a', remove=True) | |
358 |
|
345 | |||
359 | a.on_trait_change(callback3, 'a') |
|
346 | a.on_trait_change(callback3, 'a') | |
360 | a.a = 10000 |
|
347 | a.a = 10000 | |
361 | self.assertEqual(self.cb,('a',1000,10000)) |
|
348 | self.assertEqual(self.cb,('a',1000,10000)) | |
362 | a.on_trait_change(callback3, 'a', remove=True) |
|
349 | a.on_trait_change(callback3, 'a', remove=True) | |
363 |
|
350 | |||
364 | self.assertEqual(len(a._trait_notifiers['a']),0) |
|
351 | self.assertEqual(len(a._trait_notifiers['a']),0) | |
365 |
|
352 | |||
366 | def test_notify_only_once(self): |
|
353 | def test_notify_only_once(self): | |
367 |
|
354 | |||
368 | class A(HasTraits): |
|
355 | class A(HasTraits): | |
369 | listen_to = ['a'] |
|
356 | listen_to = ['a'] | |
370 |
|
357 | |||
371 | a = Int(0) |
|
358 | a = Int(0) | |
372 | b = 0 |
|
359 | b = 0 | |
373 |
|
360 | |||
374 | def __init__(self, **kwargs): |
|
361 | def __init__(self, **kwargs): | |
375 | super(A, self).__init__(**kwargs) |
|
362 | super(A, self).__init__(**kwargs) | |
376 | self.on_trait_change(self.listener1, ['a']) |
|
363 | self.on_trait_change(self.listener1, ['a']) | |
377 |
|
364 | |||
378 | def listener1(self, name, old, new): |
|
365 | def listener1(self, name, old, new): | |
379 | self.b += 1 |
|
366 | self.b += 1 | |
380 |
|
367 | |||
381 | class B(A): |
|
368 | class B(A): | |
382 |
|
369 | |||
383 | c = 0 |
|
370 | c = 0 | |
384 | d = 0 |
|
371 | d = 0 | |
385 |
|
372 | |||
386 | def __init__(self, **kwargs): |
|
373 | def __init__(self, **kwargs): | |
387 | super(B, self).__init__(**kwargs) |
|
374 | super(B, self).__init__(**kwargs) | |
388 | self.on_trait_change(self.listener2) |
|
375 | self.on_trait_change(self.listener2) | |
389 |
|
376 | |||
390 | def listener2(self, name, old, new): |
|
377 | def listener2(self, name, old, new): | |
391 | self.c += 1 |
|
378 | self.c += 1 | |
392 |
|
379 | |||
393 | def _a_changed(self, name, old, new): |
|
380 | def _a_changed(self, name, old, new): | |
394 | self.d += 1 |
|
381 | self.d += 1 | |
395 |
|
382 | |||
396 | b = B() |
|
383 | b = B() | |
397 | b.a += 1 |
|
384 | b.a += 1 | |
398 | self.assertEqual(b.b, b.c) |
|
385 | self.assertEqual(b.b, b.c) | |
399 | self.assertEqual(b.b, b.d) |
|
386 | self.assertEqual(b.b, b.d) | |
400 | b.a += 1 |
|
387 | b.a += 1 | |
401 | self.assertEqual(b.b, b.c) |
|
388 | self.assertEqual(b.b, b.c) | |
402 | self.assertEqual(b.b, b.d) |
|
389 | self.assertEqual(b.b, b.d) | |
403 |
|
390 | |||
404 |
|
391 | |||
405 | class TestHasTraits(TestCase): |
|
392 | class TestHasTraits(TestCase): | |
406 |
|
393 | |||
407 | def test_trait_names(self): |
|
394 | def test_trait_names(self): | |
408 | class A(HasTraits): |
|
395 | class A(HasTraits): | |
409 | i = Int |
|
396 | i = Int | |
410 | f = Float |
|
397 | f = Float | |
411 | a = A() |
|
398 | a = A() | |
412 | self.assertEqual(sorted(a.trait_names()),['f','i']) |
|
399 | self.assertEqual(sorted(a.trait_names()),['f','i']) | |
413 | self.assertEqual(sorted(A.class_trait_names()),['f','i']) |
|
400 | self.assertEqual(sorted(A.class_trait_names()),['f','i']) | |
414 |
|
401 | |||
415 | def test_trait_metadata(self): |
|
402 | def test_trait_metadata(self): | |
416 | class A(HasTraits): |
|
403 | class A(HasTraits): | |
417 | i = Int(config_key='MY_VALUE') |
|
404 | i = Int(config_key='MY_VALUE') | |
418 | a = A() |
|
405 | a = A() | |
419 | self.assertEqual(a.trait_metadata('i','config_key'), 'MY_VALUE') |
|
406 | self.assertEqual(a.trait_metadata('i','config_key'), 'MY_VALUE') | |
420 |
|
407 | |||
421 | def test_traits(self): |
|
408 | def test_traits(self): | |
422 | class A(HasTraits): |
|
409 | class A(HasTraits): | |
423 | i = Int |
|
410 | i = Int | |
424 | f = Float |
|
411 | f = Float | |
425 | a = A() |
|
412 | a = A() | |
426 | self.assertEqual(a.traits(), dict(i=A.i, f=A.f)) |
|
413 | self.assertEqual(a.traits(), dict(i=A.i, f=A.f)) | |
427 | self.assertEqual(A.class_traits(), dict(i=A.i, f=A.f)) |
|
414 | self.assertEqual(A.class_traits(), dict(i=A.i, f=A.f)) | |
428 |
|
415 | |||
429 | def test_traits_metadata(self): |
|
416 | def test_traits_metadata(self): | |
430 | class A(HasTraits): |
|
417 | class A(HasTraits): | |
431 | i = Int(config_key='VALUE1', other_thing='VALUE2') |
|
418 | i = Int(config_key='VALUE1', other_thing='VALUE2') | |
432 | f = Float(config_key='VALUE3', other_thing='VALUE2') |
|
419 | f = Float(config_key='VALUE3', other_thing='VALUE2') | |
433 | j = Int(0) |
|
420 | j = Int(0) | |
434 | a = A() |
|
421 | a = A() | |
435 | self.assertEqual(a.traits(), dict(i=A.i, f=A.f, j=A.j)) |
|
422 | self.assertEqual(a.traits(), dict(i=A.i, f=A.f, j=A.j)) | |
436 | traits = a.traits(config_key='VALUE1', other_thing='VALUE2') |
|
423 | traits = a.traits(config_key='VALUE1', other_thing='VALUE2') | |
437 | self.assertEqual(traits, dict(i=A.i)) |
|
424 | self.assertEqual(traits, dict(i=A.i)) | |
438 |
|
425 | |||
439 | # This passes, but it shouldn't because I am replicating a bug in |
|
426 | # This passes, but it shouldn't because I am replicating a bug in | |
440 | # traits. |
|
427 | # traits. | |
441 | traits = a.traits(config_key=lambda v: True) |
|
428 | traits = a.traits(config_key=lambda v: True) | |
442 | self.assertEqual(traits, dict(i=A.i, f=A.f, j=A.j)) |
|
429 | self.assertEqual(traits, dict(i=A.i, f=A.f, j=A.j)) | |
443 |
|
430 | |||
444 | def test_init(self): |
|
431 | def test_init(self): | |
445 | class A(HasTraits): |
|
432 | class A(HasTraits): | |
446 | i = Int() |
|
433 | i = Int() | |
447 | x = Float() |
|
434 | x = Float() | |
448 | a = A(i=1, x=10.0) |
|
435 | a = A(i=1, x=10.0) | |
449 | self.assertEqual(a.i, 1) |
|
436 | self.assertEqual(a.i, 1) | |
450 | self.assertEqual(a.x, 10.0) |
|
437 | self.assertEqual(a.x, 10.0) | |
451 |
|
438 | |||
452 | def test_positional_args(self): |
|
439 | def test_positional_args(self): | |
453 | class A(HasTraits): |
|
440 | class A(HasTraits): | |
454 | i = Int(0) |
|
441 | i = Int(0) | |
455 | def __init__(self, i): |
|
442 | def __init__(self, i): | |
456 | super(A, self).__init__() |
|
443 | super(A, self).__init__() | |
457 | self.i = i |
|
444 | self.i = i | |
458 |
|
445 | |||
459 | a = A(5) |
|
446 | a = A(5) | |
460 | self.assertEqual(a.i, 5) |
|
447 | self.assertEqual(a.i, 5) | |
461 | # should raise TypeError if no positional arg given |
|
448 | # should raise TypeError if no positional arg given | |
462 | self.assertRaises(TypeError, A) |
|
449 | self.assertRaises(TypeError, A) | |
463 |
|
450 | |||
464 | #----------------------------------------------------------------------------- |
|
451 | #----------------------------------------------------------------------------- | |
465 | # Tests for specific trait types |
|
452 | # Tests for specific trait types | |
466 | #----------------------------------------------------------------------------- |
|
453 | #----------------------------------------------------------------------------- | |
467 |
|
454 | |||
468 |
|
455 | |||
469 | class TestType(TestCase): |
|
456 | class TestType(TestCase): | |
470 |
|
457 | |||
471 | def test_default(self): |
|
458 | def test_default(self): | |
472 |
|
459 | |||
473 | class B(object): pass |
|
460 | class B(object): pass | |
474 | class A(HasTraits): |
|
461 | class A(HasTraits): | |
475 | klass = Type |
|
462 | klass = Type | |
476 |
|
463 | |||
477 | a = A() |
|
464 | a = A() | |
478 | self.assertEqual(a.klass, None) |
|
465 | self.assertEqual(a.klass, None) | |
479 |
|
466 | |||
480 | a.klass = B |
|
467 | a.klass = B | |
481 | self.assertEqual(a.klass, B) |
|
468 | self.assertEqual(a.klass, B) | |
482 | self.assertRaises(TraitError, setattr, a, 'klass', 10) |
|
469 | self.assertRaises(TraitError, setattr, a, 'klass', 10) | |
483 |
|
470 | |||
484 | def test_value(self): |
|
471 | def test_value(self): | |
485 |
|
472 | |||
486 | class B(object): pass |
|
473 | class B(object): pass | |
487 | class C(object): pass |
|
474 | class C(object): pass | |
488 | class A(HasTraits): |
|
475 | class A(HasTraits): | |
489 | klass = Type(B) |
|
476 | klass = Type(B) | |
490 |
|
477 | |||
491 | a = A() |
|
478 | a = A() | |
492 | self.assertEqual(a.klass, B) |
|
479 | self.assertEqual(a.klass, B) | |
493 | self.assertRaises(TraitError, setattr, a, 'klass', C) |
|
480 | self.assertRaises(TraitError, setattr, a, 'klass', C) | |
494 | self.assertRaises(TraitError, setattr, a, 'klass', object) |
|
481 | self.assertRaises(TraitError, setattr, a, 'klass', object) | |
495 | a.klass = B |
|
482 | a.klass = B | |
496 |
|
483 | |||
497 | def test_allow_none(self): |
|
484 | def test_allow_none(self): | |
498 |
|
485 | |||
499 | class B(object): pass |
|
486 | class B(object): pass | |
500 | class C(B): pass |
|
487 | class C(B): pass | |
501 | class A(HasTraits): |
|
488 | class A(HasTraits): | |
502 | klass = Type(B, allow_none=False) |
|
489 | klass = Type(B, allow_none=False) | |
503 |
|
490 | |||
504 | a = A() |
|
491 | a = A() | |
505 | self.assertEqual(a.klass, B) |
|
492 | self.assertEqual(a.klass, B) | |
506 | self.assertRaises(TraitError, setattr, a, 'klass', None) |
|
493 | self.assertRaises(TraitError, setattr, a, 'klass', None) | |
507 | a.klass = C |
|
494 | a.klass = C | |
508 | self.assertEqual(a.klass, C) |
|
495 | self.assertEqual(a.klass, C) | |
509 |
|
496 | |||
510 | def test_validate_klass(self): |
|
497 | def test_validate_klass(self): | |
511 |
|
498 | |||
512 | class A(HasTraits): |
|
499 | class A(HasTraits): | |
513 | klass = Type('no strings allowed') |
|
500 | klass = Type('no strings allowed') | |
514 |
|
501 | |||
515 | self.assertRaises(ImportError, A) |
|
502 | self.assertRaises(ImportError, A) | |
516 |
|
503 | |||
517 | class A(HasTraits): |
|
504 | class A(HasTraits): | |
518 | klass = Type('rub.adub.Duck') |
|
505 | klass = Type('rub.adub.Duck') | |
519 |
|
506 | |||
520 | self.assertRaises(ImportError, A) |
|
507 | self.assertRaises(ImportError, A) | |
521 |
|
508 | |||
522 | def test_validate_default(self): |
|
509 | def test_validate_default(self): | |
523 |
|
510 | |||
524 | class B(object): pass |
|
511 | class B(object): pass | |
525 | class A(HasTraits): |
|
512 | class A(HasTraits): | |
526 | klass = Type('bad default', B) |
|
513 | klass = Type('bad default', B) | |
527 |
|
514 | |||
528 | self.assertRaises(ImportError, A) |
|
515 | self.assertRaises(ImportError, A) | |
529 |
|
516 | |||
530 | class C(HasTraits): |
|
517 | class C(HasTraits): | |
531 | klass = Type(None, B, allow_none=False) |
|
518 | klass = Type(None, B, allow_none=False) | |
532 |
|
519 | |||
533 | self.assertRaises(TraitError, C) |
|
520 | self.assertRaises(TraitError, C) | |
534 |
|
521 | |||
535 | def test_str_klass(self): |
|
522 | def test_str_klass(self): | |
536 |
|
523 | |||
537 | class A(HasTraits): |
|
524 | class A(HasTraits): | |
538 | klass = Type('IPython.utils.ipstruct.Struct') |
|
525 | klass = Type('IPython.utils.ipstruct.Struct') | |
539 |
|
526 | |||
540 | from IPython.utils.ipstruct import Struct |
|
527 | from IPython.utils.ipstruct import Struct | |
541 | a = A() |
|
528 | a = A() | |
542 | a.klass = Struct |
|
529 | a.klass = Struct | |
543 | self.assertEqual(a.klass, Struct) |
|
530 | self.assertEqual(a.klass, Struct) | |
544 |
|
531 | |||
545 | self.assertRaises(TraitError, setattr, a, 'klass', 10) |
|
532 | self.assertRaises(TraitError, setattr, a, 'klass', 10) | |
546 |
|
533 | |||
547 | class TestInstance(TestCase): |
|
534 | class TestInstance(TestCase): | |
548 |
|
535 | |||
549 | def test_basic(self): |
|
536 | def test_basic(self): | |
550 | class Foo(object): pass |
|
537 | class Foo(object): pass | |
551 | class Bar(Foo): pass |
|
538 | class Bar(Foo): pass | |
552 | class Bah(object): pass |
|
539 | class Bah(object): pass | |
553 |
|
540 | |||
554 | class A(HasTraits): |
|
541 | class A(HasTraits): | |
555 | inst = Instance(Foo) |
|
542 | inst = Instance(Foo) | |
556 |
|
543 | |||
557 | a = A() |
|
544 | a = A() | |
558 | self.assertTrue(a.inst is None) |
|
545 | self.assertTrue(a.inst is None) | |
559 | a.inst = Foo() |
|
546 | a.inst = Foo() | |
560 | self.assertTrue(isinstance(a.inst, Foo)) |
|
547 | self.assertTrue(isinstance(a.inst, Foo)) | |
561 | a.inst = Bar() |
|
548 | a.inst = Bar() | |
562 | self.assertTrue(isinstance(a.inst, Foo)) |
|
549 | self.assertTrue(isinstance(a.inst, Foo)) | |
563 | self.assertRaises(TraitError, setattr, a, 'inst', Foo) |
|
550 | self.assertRaises(TraitError, setattr, a, 'inst', Foo) | |
564 | self.assertRaises(TraitError, setattr, a, 'inst', Bar) |
|
551 | self.assertRaises(TraitError, setattr, a, 'inst', Bar) | |
565 | self.assertRaises(TraitError, setattr, a, 'inst', Bah()) |
|
552 | self.assertRaises(TraitError, setattr, a, 'inst', Bah()) | |
566 |
|
553 | |||
567 | def test_unique_default_value(self): |
|
554 | def test_unique_default_value(self): | |
568 | class Foo(object): pass |
|
555 | class Foo(object): pass | |
569 | class A(HasTraits): |
|
556 | class A(HasTraits): | |
570 | inst = Instance(Foo,(),{}) |
|
557 | inst = Instance(Foo,(),{}) | |
571 |
|
558 | |||
572 | a = A() |
|
559 | a = A() | |
573 | b = A() |
|
560 | b = A() | |
574 | self.assertTrue(a.inst is not b.inst) |
|
561 | self.assertTrue(a.inst is not b.inst) | |
575 |
|
562 | |||
576 | def test_args_kw(self): |
|
563 | def test_args_kw(self): | |
577 | class Foo(object): |
|
564 | class Foo(object): | |
578 | def __init__(self, c): self.c = c |
|
565 | def __init__(self, c): self.c = c | |
579 | class Bar(object): pass |
|
566 | class Bar(object): pass | |
580 | class Bah(object): |
|
567 | class Bah(object): | |
581 | def __init__(self, c, d): |
|
568 | def __init__(self, c, d): | |
582 | self.c = c; self.d = d |
|
569 | self.c = c; self.d = d | |
583 |
|
570 | |||
584 | class A(HasTraits): |
|
571 | class A(HasTraits): | |
585 | inst = Instance(Foo, (10,)) |
|
572 | inst = Instance(Foo, (10,)) | |
586 | a = A() |
|
573 | a = A() | |
587 | self.assertEqual(a.inst.c, 10) |
|
574 | self.assertEqual(a.inst.c, 10) | |
588 |
|
575 | |||
589 | class B(HasTraits): |
|
576 | class B(HasTraits): | |
590 | inst = Instance(Bah, args=(10,), kw=dict(d=20)) |
|
577 | inst = Instance(Bah, args=(10,), kw=dict(d=20)) | |
591 | b = B() |
|
578 | b = B() | |
592 | self.assertEqual(b.inst.c, 10) |
|
579 | self.assertEqual(b.inst.c, 10) | |
593 | self.assertEqual(b.inst.d, 20) |
|
580 | self.assertEqual(b.inst.d, 20) | |
594 |
|
581 | |||
595 | class C(HasTraits): |
|
582 | class C(HasTraits): | |
596 | inst = Instance(Foo) |
|
583 | inst = Instance(Foo) | |
597 | c = C() |
|
584 | c = C() | |
598 | self.assertTrue(c.inst is None) |
|
585 | self.assertTrue(c.inst is None) | |
599 |
|
586 | |||
600 | def test_bad_default(self): |
|
587 | def test_bad_default(self): | |
601 | class Foo(object): pass |
|
588 | class Foo(object): pass | |
602 |
|
589 | |||
603 | class A(HasTraits): |
|
590 | class A(HasTraits): | |
604 | inst = Instance(Foo, allow_none=False) |
|
591 | inst = Instance(Foo, allow_none=False) | |
605 |
|
592 | |||
606 | self.assertRaises(TraitError, A) |
|
593 | self.assertRaises(TraitError, A) | |
607 |
|
594 | |||
608 | def test_instance(self): |
|
595 | def test_instance(self): | |
609 | class Foo(object): pass |
|
596 | class Foo(object): pass | |
610 |
|
597 | |||
611 | def inner(): |
|
598 | def inner(): | |
612 | class A(HasTraits): |
|
599 | class A(HasTraits): | |
613 | inst = Instance(Foo()) |
|
600 | inst = Instance(Foo()) | |
614 |
|
601 | |||
615 | self.assertRaises(TraitError, inner) |
|
602 | self.assertRaises(TraitError, inner) | |
616 |
|
603 | |||
617 |
|
604 | |||
618 | class TestThis(TestCase): |
|
605 | class TestThis(TestCase): | |
619 |
|
606 | |||
620 | def test_this_class(self): |
|
607 | def test_this_class(self): | |
621 | class Foo(HasTraits): |
|
608 | class Foo(HasTraits): | |
622 | this = This |
|
609 | this = This | |
623 |
|
610 | |||
624 | f = Foo() |
|
611 | f = Foo() | |
625 | self.assertEqual(f.this, None) |
|
612 | self.assertEqual(f.this, None) | |
626 | g = Foo() |
|
613 | g = Foo() | |
627 | f.this = g |
|
614 | f.this = g | |
628 | self.assertEqual(f.this, g) |
|
615 | self.assertEqual(f.this, g) | |
629 | self.assertRaises(TraitError, setattr, f, 'this', 10) |
|
616 | self.assertRaises(TraitError, setattr, f, 'this', 10) | |
630 |
|
617 | |||
631 | def test_this_inst(self): |
|
618 | def test_this_inst(self): | |
632 | class Foo(HasTraits): |
|
619 | class Foo(HasTraits): | |
633 | this = This() |
|
620 | this = This() | |
634 |
|
621 | |||
635 | f = Foo() |
|
622 | f = Foo() | |
636 | f.this = Foo() |
|
623 | f.this = Foo() | |
637 | self.assertTrue(isinstance(f.this, Foo)) |
|
624 | self.assertTrue(isinstance(f.this, Foo)) | |
638 |
|
625 | |||
639 | def test_subclass(self): |
|
626 | def test_subclass(self): | |
640 | class Foo(HasTraits): |
|
627 | class Foo(HasTraits): | |
641 | t = This() |
|
628 | t = This() | |
642 | class Bar(Foo): |
|
629 | class Bar(Foo): | |
643 | pass |
|
630 | pass | |
644 | f = Foo() |
|
631 | f = Foo() | |
645 | b = Bar() |
|
632 | b = Bar() | |
646 | f.t = b |
|
633 | f.t = b | |
647 | b.t = f |
|
634 | b.t = f | |
648 | self.assertEqual(f.t, b) |
|
635 | self.assertEqual(f.t, b) | |
649 | self.assertEqual(b.t, f) |
|
636 | self.assertEqual(b.t, f) | |
650 |
|
637 | |||
651 | def test_subclass_override(self): |
|
638 | def test_subclass_override(self): | |
652 | class Foo(HasTraits): |
|
639 | class Foo(HasTraits): | |
653 | t = This() |
|
640 | t = This() | |
654 | class Bar(Foo): |
|
641 | class Bar(Foo): | |
655 | t = This() |
|
642 | t = This() | |
656 | f = Foo() |
|
643 | f = Foo() | |
657 | b = Bar() |
|
644 | b = Bar() | |
658 | f.t = b |
|
645 | f.t = b | |
659 | self.assertEqual(f.t, b) |
|
646 | self.assertEqual(f.t, b) | |
660 | self.assertRaises(TraitError, setattr, b, 't', f) |
|
647 | self.assertRaises(TraitError, setattr, b, 't', f) | |
661 |
|
648 | |||
662 | class TraitTestBase(TestCase): |
|
649 | class TraitTestBase(TestCase): | |
663 | """A best testing class for basic trait types.""" |
|
650 | """A best testing class for basic trait types.""" | |
664 |
|
651 | |||
665 | def assign(self, value): |
|
652 | def assign(self, value): | |
666 | self.obj.value = value |
|
653 | self.obj.value = value | |
667 |
|
654 | |||
668 | def coerce(self, value): |
|
655 | def coerce(self, value): | |
669 | return value |
|
656 | return value | |
670 |
|
657 | |||
671 | def test_good_values(self): |
|
658 | def test_good_values(self): | |
672 | if hasattr(self, '_good_values'): |
|
659 | if hasattr(self, '_good_values'): | |
673 | for value in self._good_values: |
|
660 | for value in self._good_values: | |
674 | self.assign(value) |
|
661 | self.assign(value) | |
675 | self.assertEqual(self.obj.value, self.coerce(value)) |
|
662 | self.assertEqual(self.obj.value, self.coerce(value)) | |
676 |
|
663 | |||
677 | def test_bad_values(self): |
|
664 | def test_bad_values(self): | |
678 | if hasattr(self, '_bad_values'): |
|
665 | if hasattr(self, '_bad_values'): | |
679 | for value in self._bad_values: |
|
666 | for value in self._bad_values: | |
680 | try: |
|
667 | try: | |
681 | self.assertRaises(TraitError, self.assign, value) |
|
668 | self.assertRaises(TraitError, self.assign, value) | |
682 | except AssertionError: |
|
669 | except AssertionError: | |
683 | assert False, value |
|
670 | assert False, value | |
684 |
|
671 | |||
685 | def test_default_value(self): |
|
672 | def test_default_value(self): | |
686 | if hasattr(self, '_default_value'): |
|
673 | if hasattr(self, '_default_value'): | |
687 | self.assertEqual(self._default_value, self.obj.value) |
|
674 | self.assertEqual(self._default_value, self.obj.value) | |
688 |
|
675 | |||
689 | def tearDown(self): |
|
676 | def tearDown(self): | |
690 | # restore default value after tests, if set |
|
677 | # restore default value after tests, if set | |
691 | if hasattr(self, '_default_value'): |
|
678 | if hasattr(self, '_default_value'): | |
692 | self.obj.value = self._default_value |
|
679 | self.obj.value = self._default_value | |
693 |
|
680 | |||
694 |
|
681 | |||
695 | class AnyTrait(HasTraits): |
|
682 | class AnyTrait(HasTraits): | |
696 |
|
683 | |||
697 | value = Any |
|
684 | value = Any | |
698 |
|
685 | |||
699 | class AnyTraitTest(TraitTestBase): |
|
686 | class AnyTraitTest(TraitTestBase): | |
700 |
|
687 | |||
701 | obj = AnyTrait() |
|
688 | obj = AnyTrait() | |
702 |
|
689 | |||
703 | _default_value = None |
|
690 | _default_value = None | |
704 | _good_values = [10.0, 'ten', u'ten', [10], {'ten': 10},(10,), None, 1j] |
|
691 | _good_values = [10.0, 'ten', u'ten', [10], {'ten': 10},(10,), None, 1j] | |
705 | _bad_values = [] |
|
692 | _bad_values = [] | |
706 |
|
693 | |||
707 |
|
694 | |||
708 | class IntTrait(HasTraits): |
|
695 | class IntTrait(HasTraits): | |
709 |
|
696 | |||
710 | value = Int(99) |
|
697 | value = Int(99) | |
711 |
|
698 | |||
712 | class TestInt(TraitTestBase): |
|
699 | class TestInt(TraitTestBase): | |
713 |
|
700 | |||
714 | obj = IntTrait() |
|
701 | obj = IntTrait() | |
715 | _default_value = 99 |
|
702 | _default_value = 99 | |
716 | _good_values = [10, -10] |
|
703 | _good_values = [10, -10] | |
717 | _bad_values = ['ten', u'ten', [10], {'ten': 10},(10,), None, 1j, |
|
704 | _bad_values = ['ten', u'ten', [10], {'ten': 10},(10,), None, 1j, | |
718 | 10.1, -10.1, '10L', '-10L', '10.1', '-10.1', u'10L', |
|
705 | 10.1, -10.1, '10L', '-10L', '10.1', '-10.1', u'10L', | |
719 | u'-10L', u'10.1', u'-10.1', '10', '-10', u'10', u'-10'] |
|
706 | u'-10L', u'10.1', u'-10.1', '10', '-10', u'10', u'-10'] | |
720 | if not py3compat.PY3: |
|
707 | if not py3compat.PY3: | |
721 | _bad_values.extend([long(10), long(-10), 10*sys.maxint, -10*sys.maxint]) |
|
708 | _bad_values.extend([long(10), long(-10), 10*sys.maxint, -10*sys.maxint]) | |
722 |
|
709 | |||
723 |
|
710 | |||
724 | class LongTrait(HasTraits): |
|
711 | class LongTrait(HasTraits): | |
725 |
|
712 | |||
726 | value = Long(99 if py3compat.PY3 else long(99)) |
|
713 | value = Long(99 if py3compat.PY3 else long(99)) | |
727 |
|
714 | |||
728 | class TestLong(TraitTestBase): |
|
715 | class TestLong(TraitTestBase): | |
729 |
|
716 | |||
730 | obj = LongTrait() |
|
717 | obj = LongTrait() | |
731 |
|
718 | |||
732 | _default_value = 99 if py3compat.PY3 else long(99) |
|
719 | _default_value = 99 if py3compat.PY3 else long(99) | |
733 | _good_values = [10, -10] |
|
720 | _good_values = [10, -10] | |
734 | _bad_values = ['ten', u'ten', [10], {'ten': 10},(10,), |
|
721 | _bad_values = ['ten', u'ten', [10], {'ten': 10},(10,), | |
735 | None, 1j, 10.1, -10.1, '10', '-10', '10L', '-10L', '10.1', |
|
722 | None, 1j, 10.1, -10.1, '10', '-10', '10L', '-10L', '10.1', | |
736 | '-10.1', u'10', u'-10', u'10L', u'-10L', u'10.1', |
|
723 | '-10.1', u'10', u'-10', u'10L', u'-10L', u'10.1', | |
737 | u'-10.1'] |
|
724 | u'-10.1'] | |
738 | if not py3compat.PY3: |
|
725 | if not py3compat.PY3: | |
739 | # maxint undefined on py3, because int == long |
|
726 | # maxint undefined on py3, because int == long | |
740 | _good_values.extend([long(10), long(-10), 10*sys.maxint, -10*sys.maxint]) |
|
727 | _good_values.extend([long(10), long(-10), 10*sys.maxint, -10*sys.maxint]) | |
741 | _bad_values.extend([[long(10)], (long(10),)]) |
|
728 | _bad_values.extend([[long(10)], (long(10),)]) | |
742 |
|
729 | |||
743 | @skipif(py3compat.PY3, "not relevant on py3") |
|
730 | @skipif(py3compat.PY3, "not relevant on py3") | |
744 | def test_cast_small(self): |
|
731 | def test_cast_small(self): | |
745 | """Long casts ints to long""" |
|
732 | """Long casts ints to long""" | |
746 | self.obj.value = 10 |
|
733 | self.obj.value = 10 | |
747 | self.assertEqual(type(self.obj.value), long) |
|
734 | self.assertEqual(type(self.obj.value), long) | |
748 |
|
735 | |||
749 |
|
736 | |||
750 | class IntegerTrait(HasTraits): |
|
737 | class IntegerTrait(HasTraits): | |
751 | value = Integer(1) |
|
738 | value = Integer(1) | |
752 |
|
739 | |||
753 | class TestInteger(TestLong): |
|
740 | class TestInteger(TestLong): | |
754 | obj = IntegerTrait() |
|
741 | obj = IntegerTrait() | |
755 | _default_value = 1 |
|
742 | _default_value = 1 | |
756 |
|
743 | |||
757 | def coerce(self, n): |
|
744 | def coerce(self, n): | |
758 | return int(n) |
|
745 | return int(n) | |
759 |
|
746 | |||
760 | @skipif(py3compat.PY3, "not relevant on py3") |
|
747 | @skipif(py3compat.PY3, "not relevant on py3") | |
761 | def test_cast_small(self): |
|
748 | def test_cast_small(self): | |
762 | """Integer casts small longs to int""" |
|
749 | """Integer casts small longs to int""" | |
763 | if py3compat.PY3: |
|
750 | if py3compat.PY3: | |
764 | raise SkipTest("not relevant on py3") |
|
751 | raise SkipTest("not relevant on py3") | |
765 |
|
752 | |||
766 | self.obj.value = long(100) |
|
753 | self.obj.value = long(100) | |
767 | self.assertEqual(type(self.obj.value), int) |
|
754 | self.assertEqual(type(self.obj.value), int) | |
768 |
|
755 | |||
769 |
|
756 | |||
770 | class FloatTrait(HasTraits): |
|
757 | class FloatTrait(HasTraits): | |
771 |
|
758 | |||
772 | value = Float(99.0) |
|
759 | value = Float(99.0) | |
773 |
|
760 | |||
774 | class TestFloat(TraitTestBase): |
|
761 | class TestFloat(TraitTestBase): | |
775 |
|
762 | |||
776 | obj = FloatTrait() |
|
763 | obj = FloatTrait() | |
777 |
|
764 | |||
778 | _default_value = 99.0 |
|
765 | _default_value = 99.0 | |
779 | _good_values = [10, -10, 10.1, -10.1] |
|
766 | _good_values = [10, -10, 10.1, -10.1] | |
780 | _bad_values = ['ten', u'ten', [10], {'ten': 10},(10,), None, |
|
767 | _bad_values = ['ten', u'ten', [10], {'ten': 10},(10,), None, | |
781 | 1j, '10', '-10', '10L', '-10L', '10.1', '-10.1', u'10', |
|
768 | 1j, '10', '-10', '10L', '-10L', '10.1', '-10.1', u'10', | |
782 | u'-10', u'10L', u'-10L', u'10.1', u'-10.1'] |
|
769 | u'-10', u'10L', u'-10L', u'10.1', u'-10.1'] | |
783 | if not py3compat.PY3: |
|
770 | if not py3compat.PY3: | |
784 | _bad_values.extend([long(10), long(-10)]) |
|
771 | _bad_values.extend([long(10), long(-10)]) | |
785 |
|
772 | |||
786 |
|
773 | |||
787 | class ComplexTrait(HasTraits): |
|
774 | class ComplexTrait(HasTraits): | |
788 |
|
775 | |||
789 | value = Complex(99.0-99.0j) |
|
776 | value = Complex(99.0-99.0j) | |
790 |
|
777 | |||
791 | class TestComplex(TraitTestBase): |
|
778 | class TestComplex(TraitTestBase): | |
792 |
|
779 | |||
793 | obj = ComplexTrait() |
|
780 | obj = ComplexTrait() | |
794 |
|
781 | |||
795 | _default_value = 99.0-99.0j |
|
782 | _default_value = 99.0-99.0j | |
796 | _good_values = [10, -10, 10.1, -10.1, 10j, 10+10j, 10-10j, |
|
783 | _good_values = [10, -10, 10.1, -10.1, 10j, 10+10j, 10-10j, | |
797 | 10.1j, 10.1+10.1j, 10.1-10.1j] |
|
784 | 10.1j, 10.1+10.1j, 10.1-10.1j] | |
798 | _bad_values = [u'10L', u'-10L', 'ten', [10], {'ten': 10},(10,), None] |
|
785 | _bad_values = [u'10L', u'-10L', 'ten', [10], {'ten': 10},(10,), None] | |
799 | if not py3compat.PY3: |
|
786 | if not py3compat.PY3: | |
800 | _bad_values.extend([long(10), long(-10)]) |
|
787 | _bad_values.extend([long(10), long(-10)]) | |
801 |
|
788 | |||
802 |
|
789 | |||
803 | class BytesTrait(HasTraits): |
|
790 | class BytesTrait(HasTraits): | |
804 |
|
791 | |||
805 | value = Bytes(b'string') |
|
792 | value = Bytes(b'string') | |
806 |
|
793 | |||
807 | class TestBytes(TraitTestBase): |
|
794 | class TestBytes(TraitTestBase): | |
808 |
|
795 | |||
809 | obj = BytesTrait() |
|
796 | obj = BytesTrait() | |
810 |
|
797 | |||
811 | _default_value = b'string' |
|
798 | _default_value = b'string' | |
812 | _good_values = [b'10', b'-10', b'10L', |
|
799 | _good_values = [b'10', b'-10', b'10L', | |
813 | b'-10L', b'10.1', b'-10.1', b'string'] |
|
800 | b'-10L', b'10.1', b'-10.1', b'string'] | |
814 | _bad_values = [10, -10, 10.1, -10.1, 1j, [10], |
|
801 | _bad_values = [10, -10, 10.1, -10.1, 1j, [10], | |
815 | ['ten'],{'ten': 10},(10,), None, u'string'] |
|
802 | ['ten'],{'ten': 10},(10,), None, u'string'] | |
816 | if not py3compat.PY3: |
|
803 | if not py3compat.PY3: | |
817 | _bad_values.extend([long(10), long(-10)]) |
|
804 | _bad_values.extend([long(10), long(-10)]) | |
818 |
|
805 | |||
819 |
|
806 | |||
820 | class UnicodeTrait(HasTraits): |
|
807 | class UnicodeTrait(HasTraits): | |
821 |
|
808 | |||
822 | value = Unicode(u'unicode') |
|
809 | value = Unicode(u'unicode') | |
823 |
|
810 | |||
824 | class TestUnicode(TraitTestBase): |
|
811 | class TestUnicode(TraitTestBase): | |
825 |
|
812 | |||
826 | obj = UnicodeTrait() |
|
813 | obj = UnicodeTrait() | |
827 |
|
814 | |||
828 | _default_value = u'unicode' |
|
815 | _default_value = u'unicode' | |
829 | _good_values = ['10', '-10', '10L', '-10L', '10.1', |
|
816 | _good_values = ['10', '-10', '10L', '-10L', '10.1', | |
830 | '-10.1', '', u'', 'string', u'string', u"β¬"] |
|
817 | '-10.1', '', u'', 'string', u'string', u"β¬"] | |
831 | _bad_values = [10, -10, 10.1, -10.1, 1j, |
|
818 | _bad_values = [10, -10, 10.1, -10.1, 1j, | |
832 | [10], ['ten'], [u'ten'], {'ten': 10},(10,), None] |
|
819 | [10], ['ten'], [u'ten'], {'ten': 10},(10,), None] | |
833 | if not py3compat.PY3: |
|
820 | if not py3compat.PY3: | |
834 | _bad_values.extend([long(10), long(-10)]) |
|
821 | _bad_values.extend([long(10), long(-10)]) | |
835 |
|
822 | |||
836 |
|
823 | |||
837 | class ObjectNameTrait(HasTraits): |
|
824 | class ObjectNameTrait(HasTraits): | |
838 | value = ObjectName("abc") |
|
825 | value = ObjectName("abc") | |
839 |
|
826 | |||
840 | class TestObjectName(TraitTestBase): |
|
827 | class TestObjectName(TraitTestBase): | |
841 | obj = ObjectNameTrait() |
|
828 | obj = ObjectNameTrait() | |
842 |
|
829 | |||
843 | _default_value = "abc" |
|
830 | _default_value = "abc" | |
844 | _good_values = ["a", "gh", "g9", "g_", "_G", u"a345_"] |
|
831 | _good_values = ["a", "gh", "g9", "g_", "_G", u"a345_"] | |
845 | _bad_values = [1, "", u"β¬", "9g", "!", "#abc", "aj@", "a.b", "a()", "a[0]", |
|
832 | _bad_values = [1, "", u"β¬", "9g", "!", "#abc", "aj@", "a.b", "a()", "a[0]", | |
846 | object(), object] |
|
833 | object(), object] | |
847 | if sys.version_info[0] < 3: |
|
834 | if sys.version_info[0] < 3: | |
848 | _bad_values.append(u"ΓΎ") |
|
835 | _bad_values.append(u"ΓΎ") | |
849 | else: |
|
836 | else: | |
850 | _good_values.append(u"ΓΎ") # ΓΎ=1 is valid in Python 3 (PEP 3131). |
|
837 | _good_values.append(u"ΓΎ") # ΓΎ=1 is valid in Python 3 (PEP 3131). | |
851 |
|
838 | |||
852 |
|
839 | |||
853 | class DottedObjectNameTrait(HasTraits): |
|
840 | class DottedObjectNameTrait(HasTraits): | |
854 | value = DottedObjectName("a.b") |
|
841 | value = DottedObjectName("a.b") | |
855 |
|
842 | |||
856 | class TestDottedObjectName(TraitTestBase): |
|
843 | class TestDottedObjectName(TraitTestBase): | |
857 | obj = DottedObjectNameTrait() |
|
844 | obj = DottedObjectNameTrait() | |
858 |
|
845 | |||
859 | _default_value = "a.b" |
|
846 | _default_value = "a.b" | |
860 | _good_values = ["A", "y.t", "y765.__repr__", "os.path.join", u"os.path.join"] |
|
847 | _good_values = ["A", "y.t", "y765.__repr__", "os.path.join", u"os.path.join"] | |
861 | _bad_values = [1, u"abc.β¬", "_.@", ".", ".abc", "abc.", ".abc."] |
|
848 | _bad_values = [1, u"abc.β¬", "_.@", ".", ".abc", "abc.", ".abc."] | |
862 | if sys.version_info[0] < 3: |
|
849 | if sys.version_info[0] < 3: | |
863 | _bad_values.append(u"t.ΓΎ") |
|
850 | _bad_values.append(u"t.ΓΎ") | |
864 | else: |
|
851 | else: | |
865 | _good_values.append(u"t.ΓΎ") |
|
852 | _good_values.append(u"t.ΓΎ") | |
866 |
|
853 | |||
867 |
|
854 | |||
868 | class TCPAddressTrait(HasTraits): |
|
855 | class TCPAddressTrait(HasTraits): | |
869 |
|
856 | |||
870 | value = TCPAddress() |
|
857 | value = TCPAddress() | |
871 |
|
858 | |||
872 | class TestTCPAddress(TraitTestBase): |
|
859 | class TestTCPAddress(TraitTestBase): | |
873 |
|
860 | |||
874 | obj = TCPAddressTrait() |
|
861 | obj = TCPAddressTrait() | |
875 |
|
862 | |||
876 | _default_value = ('127.0.0.1',0) |
|
863 | _default_value = ('127.0.0.1',0) | |
877 | _good_values = [('localhost',0),('192.168.0.1',1000),('www.google.com',80)] |
|
864 | _good_values = [('localhost',0),('192.168.0.1',1000),('www.google.com',80)] | |
878 | _bad_values = [(0,0),('localhost',10.0),('localhost',-1)] |
|
865 | _bad_values = [(0,0),('localhost',10.0),('localhost',-1)] | |
879 |
|
866 | |||
880 | class ListTrait(HasTraits): |
|
867 | class ListTrait(HasTraits): | |
881 |
|
868 | |||
882 | value = List(Int) |
|
869 | value = List(Int) | |
883 |
|
870 | |||
884 | class TestList(TraitTestBase): |
|
871 | class TestList(TraitTestBase): | |
885 |
|
872 | |||
886 | obj = ListTrait() |
|
873 | obj = ListTrait() | |
887 |
|
874 | |||
888 | _default_value = [] |
|
875 | _default_value = [] | |
889 | _good_values = [[], [1], list(range(10)), (1,2)] |
|
876 | _good_values = [[], [1], list(range(10)), (1,2)] | |
890 | _bad_values = [10, [1,'a'], 'a'] |
|
877 | _bad_values = [10, [1,'a'], 'a'] | |
891 |
|
878 | |||
892 | def coerce(self, value): |
|
879 | def coerce(self, value): | |
893 | if value is not None: |
|
880 | if value is not None: | |
894 | value = list(value) |
|
881 | value = list(value) | |
895 | return value |
|
882 | return value | |
896 |
|
883 | |||
897 | class LenListTrait(HasTraits): |
|
884 | class LenListTrait(HasTraits): | |
898 |
|
885 | |||
899 | value = List(Int, [0], minlen=1, maxlen=2) |
|
886 | value = List(Int, [0], minlen=1, maxlen=2) | |
900 |
|
887 | |||
901 | class TestLenList(TraitTestBase): |
|
888 | class TestLenList(TraitTestBase): | |
902 |
|
889 | |||
903 | obj = LenListTrait() |
|
890 | obj = LenListTrait() | |
904 |
|
891 | |||
905 | _default_value = [0] |
|
892 | _default_value = [0] | |
906 | _good_values = [[1], [1,2], (1,2)] |
|
893 | _good_values = [[1], [1,2], (1,2)] | |
907 | _bad_values = [10, [1,'a'], 'a', [], list(range(3))] |
|
894 | _bad_values = [10, [1,'a'], 'a', [], list(range(3))] | |
908 |
|
895 | |||
909 | def coerce(self, value): |
|
896 | def coerce(self, value): | |
910 | if value is not None: |
|
897 | if value is not None: | |
911 | value = list(value) |
|
898 | value = list(value) | |
912 | return value |
|
899 | return value | |
913 |
|
900 | |||
914 | class TupleTrait(HasTraits): |
|
901 | class TupleTrait(HasTraits): | |
915 |
|
902 | |||
916 | value = Tuple(Int) |
|
903 | value = Tuple(Int) | |
917 |
|
904 | |||
918 | class TestTupleTrait(TraitTestBase): |
|
905 | class TestTupleTrait(TraitTestBase): | |
919 |
|
906 | |||
920 | obj = TupleTrait() |
|
907 | obj = TupleTrait() | |
921 |
|
908 | |||
922 | _default_value = None |
|
909 | _default_value = None | |
923 | _good_values = [(1,), None, (0,), [1]] |
|
910 | _good_values = [(1,), None, (0,), [1]] | |
924 | _bad_values = [10, (1,2), ('a'), ()] |
|
911 | _bad_values = [10, (1,2), ('a'), ()] | |
925 |
|
912 | |||
926 | def coerce(self, value): |
|
913 | def coerce(self, value): | |
927 | if value is not None: |
|
914 | if value is not None: | |
928 | value = tuple(value) |
|
915 | value = tuple(value) | |
929 | return value |
|
916 | return value | |
930 |
|
917 | |||
931 | def test_invalid_args(self): |
|
918 | def test_invalid_args(self): | |
932 | self.assertRaises(TypeError, Tuple, 5) |
|
919 | self.assertRaises(TypeError, Tuple, 5) | |
933 | self.assertRaises(TypeError, Tuple, default_value='hello') |
|
920 | self.assertRaises(TypeError, Tuple, default_value='hello') | |
934 | t = Tuple(Int, CBytes, default_value=(1,5)) |
|
921 | t = Tuple(Int, CBytes, default_value=(1,5)) | |
935 |
|
922 | |||
936 | class LooseTupleTrait(HasTraits): |
|
923 | class LooseTupleTrait(HasTraits): | |
937 |
|
924 | |||
938 | value = Tuple((1,2,3)) |
|
925 | value = Tuple((1,2,3)) | |
939 |
|
926 | |||
940 | class TestLooseTupleTrait(TraitTestBase): |
|
927 | class TestLooseTupleTrait(TraitTestBase): | |
941 |
|
928 | |||
942 | obj = LooseTupleTrait() |
|
929 | obj = LooseTupleTrait() | |
943 |
|
930 | |||
944 | _default_value = (1,2,3) |
|
931 | _default_value = (1,2,3) | |
945 | _good_values = [(1,), None, [1], (0,), tuple(range(5)), tuple('hello'), ('a',5), ()] |
|
932 | _good_values = [(1,), None, [1], (0,), tuple(range(5)), tuple('hello'), ('a',5), ()] | |
946 | _bad_values = [10, 'hello', {}] |
|
933 | _bad_values = [10, 'hello', {}] | |
947 |
|
934 | |||
948 | def coerce(self, value): |
|
935 | def coerce(self, value): | |
949 | if value is not None: |
|
936 | if value is not None: | |
950 | value = tuple(value) |
|
937 | value = tuple(value) | |
951 | return value |
|
938 | return value | |
952 |
|
939 | |||
953 | def test_invalid_args(self): |
|
940 | def test_invalid_args(self): | |
954 | self.assertRaises(TypeError, Tuple, 5) |
|
941 | self.assertRaises(TypeError, Tuple, 5) | |
955 | self.assertRaises(TypeError, Tuple, default_value='hello') |
|
942 | self.assertRaises(TypeError, Tuple, default_value='hello') | |
956 | t = Tuple(Int, CBytes, default_value=(1,5)) |
|
943 | t = Tuple(Int, CBytes, default_value=(1,5)) | |
957 |
|
944 | |||
958 |
|
945 | |||
959 | class MultiTupleTrait(HasTraits): |
|
946 | class MultiTupleTrait(HasTraits): | |
960 |
|
947 | |||
961 | value = Tuple(Int, Bytes, default_value=[99,b'bottles']) |
|
948 | value = Tuple(Int, Bytes, default_value=[99,b'bottles']) | |
962 |
|
949 | |||
963 | class TestMultiTuple(TraitTestBase): |
|
950 | class TestMultiTuple(TraitTestBase): | |
964 |
|
951 | |||
965 | obj = MultiTupleTrait() |
|
952 | obj = MultiTupleTrait() | |
966 |
|
953 | |||
967 | _default_value = (99,b'bottles') |
|
954 | _default_value = (99,b'bottles') | |
968 | _good_values = [(1,b'a'), (2,b'b')] |
|
955 | _good_values = [(1,b'a'), (2,b'b')] | |
969 | _bad_values = ((),10, b'a', (1,b'a',3), (b'a',1), (1, u'a')) |
|
956 | _bad_values = ((),10, b'a', (1,b'a',3), (b'a',1), (1, u'a')) | |
970 |
|
957 | |||
971 | class CRegExpTrait(HasTraits): |
|
958 | class CRegExpTrait(HasTraits): | |
972 |
|
959 | |||
973 | value = CRegExp(r'') |
|
960 | value = CRegExp(r'') | |
974 |
|
961 | |||
975 | class TestCRegExp(TraitTestBase): |
|
962 | class TestCRegExp(TraitTestBase): | |
976 |
|
963 | |||
977 | def coerce(self, value): |
|
964 | def coerce(self, value): | |
978 | return re.compile(value) |
|
965 | return re.compile(value) | |
979 |
|
966 | |||
980 | obj = CRegExpTrait() |
|
967 | obj = CRegExpTrait() | |
981 |
|
968 | |||
982 | _default_value = re.compile(r'') |
|
969 | _default_value = re.compile(r'') | |
983 | _good_values = [r'\d+', re.compile(r'\d+')] |
|
970 | _good_values = [r'\d+', re.compile(r'\d+')] | |
984 | _bad_values = [r'(', None, ()] |
|
971 | _bad_values = [r'(', None, ()] | |
985 |
|
972 | |||
986 | class DictTrait(HasTraits): |
|
973 | class DictTrait(HasTraits): | |
987 | value = Dict() |
|
974 | value = Dict() | |
988 |
|
975 | |||
989 | def test_dict_assignment(): |
|
976 | def test_dict_assignment(): | |
990 | d = dict() |
|
977 | d = dict() | |
991 | c = DictTrait() |
|
978 | c = DictTrait() | |
992 | c.value = d |
|
979 | c.value = d | |
993 | d['a'] = 5 |
|
980 | d['a'] = 5 | |
994 | nt.assert_equal(d, c.value) |
|
981 | nt.assert_equal(d, c.value) | |
995 | nt.assert_true(c.value is d) |
|
982 | nt.assert_true(c.value is d) | |
996 |
|
983 | |||
997 | class TestLink(TestCase): |
|
984 | class TestLink(TestCase): | |
998 | def test_connect_same(self): |
|
985 | def test_connect_same(self): | |
999 | """Verify two traitlets of the same type can be linked together using link.""" |
|
986 | """Verify two traitlets of the same type can be linked together using link.""" | |
1000 |
|
987 | |||
1001 | # Create two simple classes with Int traitlets. |
|
988 | # Create two simple classes with Int traitlets. | |
1002 | class A(HasTraits): |
|
989 | class A(HasTraits): | |
1003 | value = Int() |
|
990 | value = Int() | |
1004 | a = A(value=9) |
|
991 | a = A(value=9) | |
1005 | b = A(value=8) |
|
992 | b = A(value=8) | |
1006 |
|
993 | |||
1007 | # Conenct the two classes. |
|
994 | # Conenct the two classes. | |
1008 | c = link((a, 'value'), (b, 'value')) |
|
995 | c = link((a, 'value'), (b, 'value')) | |
1009 |
|
996 | |||
1010 | # Make sure the values are the same at the point of linking. |
|
997 | # Make sure the values are the same at the point of linking. | |
1011 | self.assertEqual(a.value, b.value) |
|
998 | self.assertEqual(a.value, b.value) | |
1012 |
|
999 | |||
1013 | # Change one of the values to make sure they stay in sync. |
|
1000 | # Change one of the values to make sure they stay in sync. | |
1014 | a.value = 5 |
|
1001 | a.value = 5 | |
1015 | self.assertEqual(a.value, b.value) |
|
1002 | self.assertEqual(a.value, b.value) | |
1016 | b.value = 6 |
|
1003 | b.value = 6 | |
1017 | self.assertEqual(a.value, b.value) |
|
1004 | self.assertEqual(a.value, b.value) | |
1018 |
|
1005 | |||
1019 | def test_link_different(self): |
|
1006 | def test_link_different(self): | |
1020 | """Verify two traitlets of different types can be linked together using link.""" |
|
1007 | """Verify two traitlets of different types can be linked together using link.""" | |
1021 |
|
1008 | |||
1022 | # Create two simple classes with Int traitlets. |
|
1009 | # Create two simple classes with Int traitlets. | |
1023 | class A(HasTraits): |
|
1010 | class A(HasTraits): | |
1024 | value = Int() |
|
1011 | value = Int() | |
1025 | class B(HasTraits): |
|
1012 | class B(HasTraits): | |
1026 | count = Int() |
|
1013 | count = Int() | |
1027 | a = A(value=9) |
|
1014 | a = A(value=9) | |
1028 | b = B(count=8) |
|
1015 | b = B(count=8) | |
1029 |
|
1016 | |||
1030 | # Conenct the two classes. |
|
1017 | # Conenct the two classes. | |
1031 | c = link((a, 'value'), (b, 'count')) |
|
1018 | c = link((a, 'value'), (b, 'count')) | |
1032 |
|
1019 | |||
1033 | # Make sure the values are the same at the point of linking. |
|
1020 | # Make sure the values are the same at the point of linking. | |
1034 | self.assertEqual(a.value, b.count) |
|
1021 | self.assertEqual(a.value, b.count) | |
1035 |
|
1022 | |||
1036 | # Change one of the values to make sure they stay in sync. |
|
1023 | # Change one of the values to make sure they stay in sync. | |
1037 | a.value = 5 |
|
1024 | a.value = 5 | |
1038 | self.assertEqual(a.value, b.count) |
|
1025 | self.assertEqual(a.value, b.count) | |
1039 | b.count = 4 |
|
1026 | b.count = 4 | |
1040 | self.assertEqual(a.value, b.count) |
|
1027 | self.assertEqual(a.value, b.count) | |
1041 |
|
1028 | |||
1042 | def test_unlink(self): |
|
1029 | def test_unlink(self): | |
1043 | """Verify two linked traitlets can be unlinked.""" |
|
1030 | """Verify two linked traitlets can be unlinked.""" | |
1044 |
|
1031 | |||
1045 | # Create two simple classes with Int traitlets. |
|
1032 | # Create two simple classes with Int traitlets. | |
1046 | class A(HasTraits): |
|
1033 | class A(HasTraits): | |
1047 | value = Int() |
|
1034 | value = Int() | |
1048 | a = A(value=9) |
|
1035 | a = A(value=9) | |
1049 | b = A(value=8) |
|
1036 | b = A(value=8) | |
1050 |
|
1037 | |||
1051 | # Connect the two classes. |
|
1038 | # Connect the two classes. | |
1052 | c = link((a, 'value'), (b, 'value')) |
|
1039 | c = link((a, 'value'), (b, 'value')) | |
1053 | a.value = 4 |
|
1040 | a.value = 4 | |
1054 | c.unlink() |
|
1041 | c.unlink() | |
1055 |
|
1042 | |||
1056 | # Change one of the values to make sure they don't stay in sync. |
|
1043 | # Change one of the values to make sure they don't stay in sync. | |
1057 | a.value = 5 |
|
1044 | a.value = 5 | |
1058 | self.assertNotEqual(a.value, b.value) |
|
1045 | self.assertNotEqual(a.value, b.value) | |
1059 |
|
1046 | |||
1060 | def test_callbacks(self): |
|
1047 | def test_callbacks(self): | |
1061 | """Verify two linked traitlets have their callbacks called once.""" |
|
1048 | """Verify two linked traitlets have their callbacks called once.""" | |
1062 |
|
1049 | |||
1063 | # Create two simple classes with Int traitlets. |
|
1050 | # Create two simple classes with Int traitlets. | |
1064 | class A(HasTraits): |
|
1051 | class A(HasTraits): | |
1065 | value = Int() |
|
1052 | value = Int() | |
1066 | class B(HasTraits): |
|
1053 | class B(HasTraits): | |
1067 | count = Int() |
|
1054 | count = Int() | |
1068 | a = A(value=9) |
|
1055 | a = A(value=9) | |
1069 | b = B(count=8) |
|
1056 | b = B(count=8) | |
1070 |
|
1057 | |||
1071 | # Register callbacks that count. |
|
1058 | # Register callbacks that count. | |
1072 | callback_count = [] |
|
1059 | callback_count = [] | |
1073 | def a_callback(name, old, new): |
|
1060 | def a_callback(name, old, new): | |
1074 | callback_count.append('a') |
|
1061 | callback_count.append('a') | |
1075 | a.on_trait_change(a_callback, 'value') |
|
1062 | a.on_trait_change(a_callback, 'value') | |
1076 | def b_callback(name, old, new): |
|
1063 | def b_callback(name, old, new): | |
1077 | callback_count.append('b') |
|
1064 | callback_count.append('b') | |
1078 | b.on_trait_change(b_callback, 'count') |
|
1065 | b.on_trait_change(b_callback, 'count') | |
1079 |
|
1066 | |||
1080 | # Connect the two classes. |
|
1067 | # Connect the two classes. | |
1081 | c = link((a, 'value'), (b, 'count')) |
|
1068 | c = link((a, 'value'), (b, 'count')) | |
1082 |
|
1069 | |||
1083 | # Make sure b's count was set to a's value once. |
|
1070 | # Make sure b's count was set to a's value once. | |
1084 | self.assertEqual(''.join(callback_count), 'b') |
|
1071 | self.assertEqual(''.join(callback_count), 'b') | |
1085 | del callback_count[:] |
|
1072 | del callback_count[:] | |
1086 |
|
1073 | |||
1087 | # Make sure a's value was set to b's count once. |
|
1074 | # Make sure a's value was set to b's count once. | |
1088 | b.count = 5 |
|
1075 | b.count = 5 | |
1089 | self.assertEqual(''.join(callback_count), 'ba') |
|
1076 | self.assertEqual(''.join(callback_count), 'ba') | |
1090 | del callback_count[:] |
|
1077 | del callback_count[:] | |
1091 |
|
1078 | |||
1092 | # Make sure b's count was set to a's value once. |
|
1079 | # Make sure b's count was set to a's value once. | |
1093 | a.value = 4 |
|
1080 | a.value = 4 | |
1094 | self.assertEqual(''.join(callback_count), 'ab') |
|
1081 | self.assertEqual(''.join(callback_count), 'ab') | |
1095 | del callback_count[:] |
|
1082 | del callback_count[:] | |
|
1083 | ||||
|
1084 | class Pickleable(HasTraits): | |||
|
1085 | i = Int() | |||
|
1086 | j = Int() | |||
|
1087 | ||||
|
1088 | def _i_default(self): | |||
|
1089 | return 1 | |||
|
1090 | ||||
|
1091 | def _i_changed(self, name, old, new): | |||
|
1092 | self.j = new | |||
|
1093 | ||||
|
1094 | def test_pickle_hastraits(): | |||
|
1095 | c = Pickleable() | |||
|
1096 | for protocol in range(pickle.HIGHEST_PROTOCOL + 1): | |||
|
1097 | p = pickle.dumps(c, protocol) | |||
|
1098 | c2 = pickle.loads(p) | |||
|
1099 | nt.assert_equal(c2.i, c.i) | |||
|
1100 | nt.assert_equal(c2.j, c.j) | |||
|
1101 | ||||
|
1102 | c.i = 5 | |||
|
1103 | for protocol in range(pickle.HIGHEST_PROTOCOL + 1): | |||
|
1104 | p = pickle.dumps(c, protocol) | |||
|
1105 | c2 = pickle.loads(p) | |||
|
1106 | nt.assert_equal(c2.i, c.i) | |||
|
1107 | nt.assert_equal(c2.j, c.j) | |||
|
1108 | No newline at end of file |
@@ -1,1531 +1,1520 b'' | |||||
1 | # encoding: utf-8 |
|
1 | # encoding: utf-8 | |
2 | """ |
|
2 | """ | |
3 | A lightweight Traits like module. |
|
3 | A lightweight Traits like module. | |
4 |
|
4 | |||
5 | This is designed to provide a lightweight, simple, pure Python version of |
|
5 | This is designed to provide a lightweight, simple, pure Python version of | |
6 | many of the capabilities of enthought.traits. This includes: |
|
6 | many of the capabilities of enthought.traits. This includes: | |
7 |
|
7 | |||
8 | * Validation |
|
8 | * Validation | |
9 | * Type specification with defaults |
|
9 | * Type specification with defaults | |
10 | * Static and dynamic notification |
|
10 | * Static and dynamic notification | |
11 | * Basic predefined types |
|
11 | * Basic predefined types | |
12 | * An API that is similar to enthought.traits |
|
12 | * An API that is similar to enthought.traits | |
13 |
|
13 | |||
14 | We don't support: |
|
14 | We don't support: | |
15 |
|
15 | |||
16 | * Delegation |
|
16 | * Delegation | |
17 | * Automatic GUI generation |
|
17 | * Automatic GUI generation | |
18 | * A full set of trait types. Most importantly, we don't provide container |
|
18 | * A full set of trait types. Most importantly, we don't provide container | |
19 | traits (list, dict, tuple) that can trigger notifications if their |
|
19 | traits (list, dict, tuple) that can trigger notifications if their | |
20 | contents change. |
|
20 | contents change. | |
21 | * API compatibility with enthought.traits |
|
21 | * API compatibility with enthought.traits | |
22 |
|
22 | |||
23 | There are also some important difference in our design: |
|
23 | There are also some important difference in our design: | |
24 |
|
24 | |||
25 | * enthought.traits does not validate default values. We do. |
|
25 | * enthought.traits does not validate default values. We do. | |
26 |
|
26 | |||
27 | We choose to create this module because we need these capabilities, but |
|
27 | We choose to create this module because we need these capabilities, but | |
28 | we need them to be pure Python so they work in all Python implementations, |
|
28 | we need them to be pure Python so they work in all Python implementations, | |
29 | including Jython and IronPython. |
|
29 | including Jython and IronPython. | |
30 |
|
30 | |||
31 | Inheritance diagram: |
|
31 | Inheritance diagram: | |
32 |
|
32 | |||
33 | .. inheritance-diagram:: IPython.utils.traitlets |
|
33 | .. inheritance-diagram:: IPython.utils.traitlets | |
34 | :parts: 3 |
|
34 | :parts: 3 | |
35 |
|
||||
36 | Authors: |
|
|||
37 |
|
||||
38 | * Brian Granger |
|
|||
39 | * Enthought, Inc. Some of the code in this file comes from enthought.traits |
|
|||
40 | and is licensed under the BSD license. Also, many of the ideas also come |
|
|||
41 | from enthought.traits even though our implementation is very different. |
|
|||
42 | """ |
|
35 | """ | |
43 |
|
36 | |||
44 | #----------------------------------------------------------------------------- |
|
37 | # Copyright (c) IPython Development Team. | |
45 | # Copyright (C) 2008-2011 The IPython Development Team |
|
38 | # Distributed under the terms of the Modified BSD License. | |
46 | # |
|
39 | # | |
47 | # Distributed under the terms of the BSD License. The full license is in |
|
40 | # Adapted from enthought.traits, Copyright (c) Enthought, Inc., | |
48 | # the file COPYING, distributed as part of this software. |
|
41 | # also under the terms of the Modified BSD License. | |
49 | #----------------------------------------------------------------------------- |
|
|||
50 |
|
||||
51 | #----------------------------------------------------------------------------- |
|
|||
52 | # Imports |
|
|||
53 | #----------------------------------------------------------------------------- |
|
|||
54 |
|
42 | |||
55 | import contextlib |
|
43 | import contextlib | |
56 | import inspect |
|
44 | import inspect | |
57 | import re |
|
45 | import re | |
58 | import sys |
|
46 | import sys | |
59 | import types |
|
47 | import types | |
60 | from types import FunctionType |
|
48 | from types import FunctionType | |
61 | try: |
|
49 | try: | |
62 | from types import ClassType, InstanceType |
|
50 | from types import ClassType, InstanceType | |
63 | ClassTypes = (ClassType, type) |
|
51 | ClassTypes = (ClassType, type) | |
64 | except: |
|
52 | except: | |
65 | ClassTypes = (type,) |
|
53 | ClassTypes = (type,) | |
66 |
|
54 | |||
67 | from .importstring import import_item |
|
55 | from .importstring import import_item | |
68 | from IPython.utils import py3compat |
|
56 | from IPython.utils import py3compat | |
69 | from IPython.utils.py3compat import iteritems |
|
57 | from IPython.utils.py3compat import iteritems | |
70 | from IPython.testing.skipdoctest import skip_doctest |
|
58 | from IPython.testing.skipdoctest import skip_doctest | |
71 |
|
59 | |||
72 | SequenceTypes = (list, tuple, set, frozenset) |
|
60 | SequenceTypes = (list, tuple, set, frozenset) | |
73 |
|
61 | |||
74 | #----------------------------------------------------------------------------- |
|
62 | #----------------------------------------------------------------------------- | |
75 | # Basic classes |
|
63 | # Basic classes | |
76 | #----------------------------------------------------------------------------- |
|
64 | #----------------------------------------------------------------------------- | |
77 |
|
65 | |||
78 |
|
66 | |||
79 | class NoDefaultSpecified ( object ): pass |
|
67 | class NoDefaultSpecified ( object ): pass | |
80 | NoDefaultSpecified = NoDefaultSpecified() |
|
68 | NoDefaultSpecified = NoDefaultSpecified() | |
81 |
|
69 | |||
82 |
|
70 | |||
83 | class Undefined ( object ): pass |
|
71 | class Undefined ( object ): pass | |
84 | Undefined = Undefined() |
|
72 | Undefined = Undefined() | |
85 |
|
73 | |||
86 | class TraitError(Exception): |
|
74 | class TraitError(Exception): | |
87 | pass |
|
75 | pass | |
88 |
|
76 | |||
89 | #----------------------------------------------------------------------------- |
|
77 | #----------------------------------------------------------------------------- | |
90 | # Utilities |
|
78 | # Utilities | |
91 | #----------------------------------------------------------------------------- |
|
79 | #----------------------------------------------------------------------------- | |
92 |
|
80 | |||
93 |
|
81 | |||
94 | def class_of ( object ): |
|
82 | def class_of ( object ): | |
95 | """ Returns a string containing the class name of an object with the |
|
83 | """ Returns a string containing the class name of an object with the | |
96 | correct indefinite article ('a' or 'an') preceding it (e.g., 'an Image', |
|
84 | correct indefinite article ('a' or 'an') preceding it (e.g., 'an Image', | |
97 | 'a PlotValue'). |
|
85 | 'a PlotValue'). | |
98 | """ |
|
86 | """ | |
99 | if isinstance( object, py3compat.string_types ): |
|
87 | if isinstance( object, py3compat.string_types ): | |
100 | return add_article( object ) |
|
88 | return add_article( object ) | |
101 |
|
89 | |||
102 | return add_article( object.__class__.__name__ ) |
|
90 | return add_article( object.__class__.__name__ ) | |
103 |
|
91 | |||
104 |
|
92 | |||
105 | def add_article ( name ): |
|
93 | def add_article ( name ): | |
106 | """ Returns a string containing the correct indefinite article ('a' or 'an') |
|
94 | """ Returns a string containing the correct indefinite article ('a' or 'an') | |
107 | prefixed to the specified string. |
|
95 | prefixed to the specified string. | |
108 | """ |
|
96 | """ | |
109 | if name[:1].lower() in 'aeiou': |
|
97 | if name[:1].lower() in 'aeiou': | |
110 | return 'an ' + name |
|
98 | return 'an ' + name | |
111 |
|
99 | |||
112 | return 'a ' + name |
|
100 | return 'a ' + name | |
113 |
|
101 | |||
114 |
|
102 | |||
115 | def repr_type(obj): |
|
103 | def repr_type(obj): | |
116 | """ Return a string representation of a value and its type for readable |
|
104 | """ Return a string representation of a value and its type for readable | |
117 | error messages. |
|
105 | error messages. | |
118 | """ |
|
106 | """ | |
119 | the_type = type(obj) |
|
107 | the_type = type(obj) | |
120 | if (not py3compat.PY3) and the_type is InstanceType: |
|
108 | if (not py3compat.PY3) and the_type is InstanceType: | |
121 | # Old-style class. |
|
109 | # Old-style class. | |
122 | the_type = obj.__class__ |
|
110 | the_type = obj.__class__ | |
123 | msg = '%r %r' % (obj, the_type) |
|
111 | msg = '%r %r' % (obj, the_type) | |
124 | return msg |
|
112 | return msg | |
125 |
|
113 | |||
126 |
|
114 | |||
127 | def is_trait(t): |
|
115 | def is_trait(t): | |
128 | """ Returns whether the given value is an instance or subclass of TraitType. |
|
116 | """ Returns whether the given value is an instance or subclass of TraitType. | |
129 | """ |
|
117 | """ | |
130 | return (isinstance(t, TraitType) or |
|
118 | return (isinstance(t, TraitType) or | |
131 | (isinstance(t, type) and issubclass(t, TraitType))) |
|
119 | (isinstance(t, type) and issubclass(t, TraitType))) | |
132 |
|
120 | |||
133 |
|
121 | |||
134 | def parse_notifier_name(name): |
|
122 | def parse_notifier_name(name): | |
135 | """Convert the name argument to a list of names. |
|
123 | """Convert the name argument to a list of names. | |
136 |
|
124 | |||
137 | Examples |
|
125 | Examples | |
138 | -------- |
|
126 | -------- | |
139 |
|
127 | |||
140 | >>> parse_notifier_name('a') |
|
128 | >>> parse_notifier_name('a') | |
141 | ['a'] |
|
129 | ['a'] | |
142 | >>> parse_notifier_name(['a','b']) |
|
130 | >>> parse_notifier_name(['a','b']) | |
143 | ['a', 'b'] |
|
131 | ['a', 'b'] | |
144 | >>> parse_notifier_name(None) |
|
132 | >>> parse_notifier_name(None) | |
145 | ['anytrait'] |
|
133 | ['anytrait'] | |
146 | """ |
|
134 | """ | |
147 | if isinstance(name, str): |
|
135 | if isinstance(name, str): | |
148 | return [name] |
|
136 | return [name] | |
149 | elif name is None: |
|
137 | elif name is None: | |
150 | return ['anytrait'] |
|
138 | return ['anytrait'] | |
151 | elif isinstance(name, (list, tuple)): |
|
139 | elif isinstance(name, (list, tuple)): | |
152 | for n in name: |
|
140 | for n in name: | |
153 | assert isinstance(n, str), "names must be strings" |
|
141 | assert isinstance(n, str), "names must be strings" | |
154 | return name |
|
142 | return name | |
155 |
|
143 | |||
156 |
|
144 | |||
157 | class _SimpleTest: |
|
145 | class _SimpleTest: | |
158 | def __init__ ( self, value ): self.value = value |
|
146 | def __init__ ( self, value ): self.value = value | |
159 | def __call__ ( self, test ): |
|
147 | def __call__ ( self, test ): | |
160 | return test == self.value |
|
148 | return test == self.value | |
161 | def __repr__(self): |
|
149 | def __repr__(self): | |
162 | return "<SimpleTest(%r)" % self.value |
|
150 | return "<SimpleTest(%r)" % self.value | |
163 | def __str__(self): |
|
151 | def __str__(self): | |
164 | return self.__repr__() |
|
152 | return self.__repr__() | |
165 |
|
153 | |||
166 |
|
154 | |||
167 | def getmembers(object, predicate=None): |
|
155 | def getmembers(object, predicate=None): | |
168 | """A safe version of inspect.getmembers that handles missing attributes. |
|
156 | """A safe version of inspect.getmembers that handles missing attributes. | |
169 |
|
157 | |||
170 | This is useful when there are descriptor based attributes that for |
|
158 | This is useful when there are descriptor based attributes that for | |
171 | some reason raise AttributeError even though they exist. This happens |
|
159 | some reason raise AttributeError even though they exist. This happens | |
172 | in zope.inteface with the __provides__ attribute. |
|
160 | in zope.inteface with the __provides__ attribute. | |
173 | """ |
|
161 | """ | |
174 | results = [] |
|
162 | results = [] | |
175 | for key in dir(object): |
|
163 | for key in dir(object): | |
176 | try: |
|
164 | try: | |
177 | value = getattr(object, key) |
|
165 | value = getattr(object, key) | |
178 | except AttributeError: |
|
166 | except AttributeError: | |
179 | pass |
|
167 | pass | |
180 | else: |
|
168 | else: | |
181 | if not predicate or predicate(value): |
|
169 | if not predicate or predicate(value): | |
182 | results.append((key, value)) |
|
170 | results.append((key, value)) | |
183 | results.sort() |
|
171 | results.sort() | |
184 | return results |
|
172 | return results | |
185 |
|
173 | |||
186 | @skip_doctest |
|
174 | @skip_doctest | |
187 | class link(object): |
|
175 | class link(object): | |
188 | """Link traits from different objects together so they remain in sync. |
|
176 | """Link traits from different objects together so they remain in sync. | |
189 |
|
177 | |||
190 | Parameters |
|
178 | Parameters | |
191 | ---------- |
|
179 | ---------- | |
192 | obj : pairs of objects/attributes |
|
180 | obj : pairs of objects/attributes | |
193 |
|
181 | |||
194 | Examples |
|
182 | Examples | |
195 | -------- |
|
183 | -------- | |
196 |
|
184 | |||
197 | >>> c = link((obj1, 'value'), (obj2, 'value'), (obj3, 'value')) |
|
185 | >>> c = link((obj1, 'value'), (obj2, 'value'), (obj3, 'value')) | |
198 | >>> obj1.value = 5 # updates other objects as well |
|
186 | >>> obj1.value = 5 # updates other objects as well | |
199 | """ |
|
187 | """ | |
200 | updating = False |
|
188 | updating = False | |
201 | def __init__(self, *args): |
|
189 | def __init__(self, *args): | |
202 | if len(args) < 2: |
|
190 | if len(args) < 2: | |
203 | raise TypeError('At least two traitlets must be provided.') |
|
191 | raise TypeError('At least two traitlets must be provided.') | |
204 |
|
192 | |||
205 | self.objects = {} |
|
193 | self.objects = {} | |
206 | initial = getattr(args[0][0], args[0][1]) |
|
194 | initial = getattr(args[0][0], args[0][1]) | |
207 | for obj,attr in args: |
|
195 | for obj,attr in args: | |
208 | if getattr(obj, attr) != initial: |
|
196 | if getattr(obj, attr) != initial: | |
209 | setattr(obj, attr, initial) |
|
197 | setattr(obj, attr, initial) | |
210 |
|
198 | |||
211 | callback = self._make_closure(obj,attr) |
|
199 | callback = self._make_closure(obj,attr) | |
212 | obj.on_trait_change(callback, attr) |
|
200 | obj.on_trait_change(callback, attr) | |
213 | self.objects[(obj,attr)] = callback |
|
201 | self.objects[(obj,attr)] = callback | |
214 |
|
202 | |||
215 | @contextlib.contextmanager |
|
203 | @contextlib.contextmanager | |
216 | def _busy_updating(self): |
|
204 | def _busy_updating(self): | |
217 | self.updating = True |
|
205 | self.updating = True | |
218 | try: |
|
206 | try: | |
219 | yield |
|
207 | yield | |
220 | finally: |
|
208 | finally: | |
221 | self.updating = False |
|
209 | self.updating = False | |
222 |
|
210 | |||
223 | def _make_closure(self, sending_obj, sending_attr): |
|
211 | def _make_closure(self, sending_obj, sending_attr): | |
224 | def update(name, old, new): |
|
212 | def update(name, old, new): | |
225 | self._update(sending_obj, sending_attr, new) |
|
213 | self._update(sending_obj, sending_attr, new) | |
226 | return update |
|
214 | return update | |
227 |
|
215 | |||
228 | def _update(self, sending_obj, sending_attr, new): |
|
216 | def _update(self, sending_obj, sending_attr, new): | |
229 | if self.updating: |
|
217 | if self.updating: | |
230 | return |
|
218 | return | |
231 | with self._busy_updating(): |
|
219 | with self._busy_updating(): | |
232 | for obj,attr in self.objects.keys(): |
|
220 | for obj,attr in self.objects.keys(): | |
233 | if obj is not sending_obj or attr != sending_attr: |
|
221 | if obj is not sending_obj or attr != sending_attr: | |
234 | setattr(obj, attr, new) |
|
222 | setattr(obj, attr, new) | |
235 |
|
223 | |||
236 | def unlink(self): |
|
224 | def unlink(self): | |
237 | for key, callback in self.objects.items(): |
|
225 | for key, callback in self.objects.items(): | |
238 | (obj,attr) = key |
|
226 | (obj,attr) = key | |
239 | obj.on_trait_change(callback, attr, remove=True) |
|
227 | obj.on_trait_change(callback, attr, remove=True) | |
240 |
|
228 | |||
241 | #----------------------------------------------------------------------------- |
|
229 | #----------------------------------------------------------------------------- | |
242 | # Base TraitType for all traits |
|
230 | # Base TraitType for all traits | |
243 | #----------------------------------------------------------------------------- |
|
231 | #----------------------------------------------------------------------------- | |
244 |
|
232 | |||
245 |
|
233 | |||
246 | class TraitType(object): |
|
234 | class TraitType(object): | |
247 | """A base class for all trait descriptors. |
|
235 | """A base class for all trait descriptors. | |
248 |
|
236 | |||
249 | Notes |
|
237 | Notes | |
250 | ----- |
|
238 | ----- | |
251 | Our implementation of traits is based on Python's descriptor |
|
239 | Our implementation of traits is based on Python's descriptor | |
252 | prototol. This class is the base class for all such descriptors. The |
|
240 | prototol. This class is the base class for all such descriptors. The | |
253 | only magic we use is a custom metaclass for the main :class:`HasTraits` |
|
241 | only magic we use is a custom metaclass for the main :class:`HasTraits` | |
254 | class that does the following: |
|
242 | class that does the following: | |
255 |
|
243 | |||
256 | 1. Sets the :attr:`name` attribute of every :class:`TraitType` |
|
244 | 1. Sets the :attr:`name` attribute of every :class:`TraitType` | |
257 | instance in the class dict to the name of the attribute. |
|
245 | instance in the class dict to the name of the attribute. | |
258 | 2. Sets the :attr:`this_class` attribute of every :class:`TraitType` |
|
246 | 2. Sets the :attr:`this_class` attribute of every :class:`TraitType` | |
259 | instance in the class dict to the *class* that declared the trait. |
|
247 | instance in the class dict to the *class* that declared the trait. | |
260 | This is used by the :class:`This` trait to allow subclasses to |
|
248 | This is used by the :class:`This` trait to allow subclasses to | |
261 | accept superclasses for :class:`This` values. |
|
249 | accept superclasses for :class:`This` values. | |
262 | """ |
|
250 | """ | |
263 |
|
251 | |||
264 |
|
252 | |||
265 | metadata = {} |
|
253 | metadata = {} | |
266 | default_value = Undefined |
|
254 | default_value = Undefined | |
267 | info_text = 'any value' |
|
255 | info_text = 'any value' | |
268 |
|
256 | |||
269 | def __init__(self, default_value=NoDefaultSpecified, **metadata): |
|
257 | def __init__(self, default_value=NoDefaultSpecified, **metadata): | |
270 | """Create a TraitType. |
|
258 | """Create a TraitType. | |
271 | """ |
|
259 | """ | |
272 | if default_value is not NoDefaultSpecified: |
|
260 | if default_value is not NoDefaultSpecified: | |
273 | self.default_value = default_value |
|
261 | self.default_value = default_value | |
274 |
|
262 | |||
275 | if len(metadata) > 0: |
|
263 | if len(metadata) > 0: | |
276 | if len(self.metadata) > 0: |
|
264 | if len(self.metadata) > 0: | |
277 | self._metadata = self.metadata.copy() |
|
265 | self._metadata = self.metadata.copy() | |
278 | self._metadata.update(metadata) |
|
266 | self._metadata.update(metadata) | |
279 | else: |
|
267 | else: | |
280 | self._metadata = metadata |
|
268 | self._metadata = metadata | |
281 | else: |
|
269 | else: | |
282 | self._metadata = self.metadata |
|
270 | self._metadata = self.metadata | |
283 |
|
271 | |||
284 | self.init() |
|
272 | self.init() | |
285 |
|
273 | |||
286 | def init(self): |
|
274 | def init(self): | |
287 | pass |
|
275 | pass | |
288 |
|
276 | |||
289 | def get_default_value(self): |
|
277 | def get_default_value(self): | |
290 | """Create a new instance of the default value.""" |
|
278 | """Create a new instance of the default value.""" | |
291 | return self.default_value |
|
279 | return self.default_value | |
292 |
|
280 | |||
293 | def instance_init(self, obj): |
|
281 | def instance_init(self, obj): | |
294 | """This is called by :meth:`HasTraits.__new__` to finish init'ing. |
|
282 | """This is called by :meth:`HasTraits.__new__` to finish init'ing. | |
295 |
|
283 | |||
296 | Some stages of initialization must be delayed until the parent |
|
284 | Some stages of initialization must be delayed until the parent | |
297 | :class:`HasTraits` instance has been created. This method is |
|
285 | :class:`HasTraits` instance has been created. This method is | |
298 | called in :meth:`HasTraits.__new__` after the instance has been |
|
286 | called in :meth:`HasTraits.__new__` after the instance has been | |
299 | created. |
|
287 | created. | |
300 |
|
288 | |||
301 | This method trigger the creation and validation of default values |
|
289 | This method trigger the creation and validation of default values | |
302 | and also things like the resolution of str given class names in |
|
290 | and also things like the resolution of str given class names in | |
303 | :class:`Type` and :class`Instance`. |
|
291 | :class:`Type` and :class`Instance`. | |
304 |
|
292 | |||
305 | Parameters |
|
293 | Parameters | |
306 | ---------- |
|
294 | ---------- | |
307 | obj : :class:`HasTraits` instance |
|
295 | obj : :class:`HasTraits` instance | |
308 | The parent :class:`HasTraits` instance that has just been |
|
296 | The parent :class:`HasTraits` instance that has just been | |
309 | created. |
|
297 | created. | |
310 | """ |
|
298 | """ | |
311 | self.set_default_value(obj) |
|
299 | self.set_default_value(obj) | |
312 |
|
300 | |||
313 | def set_default_value(self, obj): |
|
301 | def set_default_value(self, obj): | |
314 | """Set the default value on a per instance basis. |
|
302 | """Set the default value on a per instance basis. | |
315 |
|
303 | |||
316 | This method is called by :meth:`instance_init` to create and |
|
304 | This method is called by :meth:`instance_init` to create and | |
317 | validate the default value. The creation and validation of |
|
305 | validate the default value. The creation and validation of | |
318 | default values must be delayed until the parent :class:`HasTraits` |
|
306 | default values must be delayed until the parent :class:`HasTraits` | |
319 | class has been instantiated. |
|
307 | class has been instantiated. | |
320 | """ |
|
308 | """ | |
321 | # Check for a deferred initializer defined in the same class as the |
|
309 | # Check for a deferred initializer defined in the same class as the | |
322 | # trait declaration or above. |
|
310 | # trait declaration or above. | |
323 | mro = type(obj).mro() |
|
311 | mro = type(obj).mro() | |
324 | meth_name = '_%s_default' % self.name |
|
312 | meth_name = '_%s_default' % self.name | |
325 | for cls in mro[:mro.index(self.this_class)+1]: |
|
313 | for cls in mro[:mro.index(self.this_class)+1]: | |
326 | if meth_name in cls.__dict__: |
|
314 | if meth_name in cls.__dict__: | |
327 | break |
|
315 | break | |
328 | else: |
|
316 | else: | |
329 | # We didn't find one. Do static initialization. |
|
317 | # We didn't find one. Do static initialization. | |
330 | dv = self.get_default_value() |
|
318 | dv = self.get_default_value() | |
331 | newdv = self._validate(obj, dv) |
|
319 | newdv = self._validate(obj, dv) | |
332 | obj._trait_values[self.name] = newdv |
|
320 | obj._trait_values[self.name] = newdv | |
333 | return |
|
321 | return | |
334 | # Complete the dynamic initialization. |
|
322 | # Complete the dynamic initialization. | |
335 |
obj._trait_dyn_inits[self.name] = |
|
323 | obj._trait_dyn_inits[self.name] = meth_name | |
336 |
|
324 | |||
337 | def __get__(self, obj, cls=None): |
|
325 | def __get__(self, obj, cls=None): | |
338 | """Get the value of the trait by self.name for the instance. |
|
326 | """Get the value of the trait by self.name for the instance. | |
339 |
|
327 | |||
340 | Default values are instantiated when :meth:`HasTraits.__new__` |
|
328 | Default values are instantiated when :meth:`HasTraits.__new__` | |
341 | is called. Thus by the time this method gets called either the |
|
329 | is called. Thus by the time this method gets called either the | |
342 | default value or a user defined value (they called :meth:`__set__`) |
|
330 | default value or a user defined value (they called :meth:`__set__`) | |
343 | is in the :class:`HasTraits` instance. |
|
331 | is in the :class:`HasTraits` instance. | |
344 | """ |
|
332 | """ | |
345 | if obj is None: |
|
333 | if obj is None: | |
346 | return self |
|
334 | return self | |
347 | else: |
|
335 | else: | |
348 | try: |
|
336 | try: | |
349 | value = obj._trait_values[self.name] |
|
337 | value = obj._trait_values[self.name] | |
350 | except KeyError: |
|
338 | except KeyError: | |
351 | # Check for a dynamic initializer. |
|
339 | # Check for a dynamic initializer. | |
352 | if self.name in obj._trait_dyn_inits: |
|
340 | if self.name in obj._trait_dyn_inits: | |
353 |
|
|
341 | method = getattr(obj, obj._trait_dyn_inits[self.name]) | |
|
342 | value = method() | |||
354 | # FIXME: Do we really validate here? |
|
343 | # FIXME: Do we really validate here? | |
355 | value = self._validate(obj, value) |
|
344 | value = self._validate(obj, value) | |
356 | obj._trait_values[self.name] = value |
|
345 | obj._trait_values[self.name] = value | |
357 | return value |
|
346 | return value | |
358 | else: |
|
347 | else: | |
359 | raise TraitError('Unexpected error in TraitType: ' |
|
348 | raise TraitError('Unexpected error in TraitType: ' | |
360 | 'both default value and dynamic initializer are ' |
|
349 | 'both default value and dynamic initializer are ' | |
361 | 'absent.') |
|
350 | 'absent.') | |
362 | except Exception: |
|
351 | except Exception: | |
363 | # HasTraits should call set_default_value to populate |
|
352 | # HasTraits should call set_default_value to populate | |
364 | # this. So this should never be reached. |
|
353 | # this. So this should never be reached. | |
365 | raise TraitError('Unexpected error in TraitType: ' |
|
354 | raise TraitError('Unexpected error in TraitType: ' | |
366 | 'default value not set properly') |
|
355 | 'default value not set properly') | |
367 | else: |
|
356 | else: | |
368 | return value |
|
357 | return value | |
369 |
|
358 | |||
370 | def __set__(self, obj, value): |
|
359 | def __set__(self, obj, value): | |
371 | new_value = self._validate(obj, value) |
|
360 | new_value = self._validate(obj, value) | |
372 | old_value = self.__get__(obj) |
|
361 | old_value = self.__get__(obj) | |
373 | obj._trait_values[self.name] = new_value |
|
362 | obj._trait_values[self.name] = new_value | |
374 | try: |
|
363 | try: | |
375 | silent = bool(old_value == new_value) |
|
364 | silent = bool(old_value == new_value) | |
376 | except: |
|
365 | except: | |
377 | # if there is an error in comparing, default to notify |
|
366 | # if there is an error in comparing, default to notify | |
378 | silent = False |
|
367 | silent = False | |
379 | if silent is not True: |
|
368 | if silent is not True: | |
380 | # we explicitly compare silent to True just in case the equality |
|
369 | # we explicitly compare silent to True just in case the equality | |
381 | # comparison above returns something other than True/False |
|
370 | # comparison above returns something other than True/False | |
382 | obj._notify_trait(self.name, old_value, new_value) |
|
371 | obj._notify_trait(self.name, old_value, new_value) | |
383 |
|
372 | |||
384 | def _validate(self, obj, value): |
|
373 | def _validate(self, obj, value): | |
385 | if hasattr(self, 'validate'): |
|
374 | if hasattr(self, 'validate'): | |
386 | return self.validate(obj, value) |
|
375 | return self.validate(obj, value) | |
387 | elif hasattr(self, 'is_valid_for'): |
|
376 | elif hasattr(self, 'is_valid_for'): | |
388 | valid = self.is_valid_for(value) |
|
377 | valid = self.is_valid_for(value) | |
389 | if valid: |
|
378 | if valid: | |
390 | return value |
|
379 | return value | |
391 | else: |
|
380 | else: | |
392 | raise TraitError('invalid value for type: %r' % value) |
|
381 | raise TraitError('invalid value for type: %r' % value) | |
393 | elif hasattr(self, 'value_for'): |
|
382 | elif hasattr(self, 'value_for'): | |
394 | return self.value_for(value) |
|
383 | return self.value_for(value) | |
395 | else: |
|
384 | else: | |
396 | return value |
|
385 | return value | |
397 |
|
386 | |||
398 | def info(self): |
|
387 | def info(self): | |
399 | return self.info_text |
|
388 | return self.info_text | |
400 |
|
389 | |||
401 | def error(self, obj, value): |
|
390 | def error(self, obj, value): | |
402 | if obj is not None: |
|
391 | if obj is not None: | |
403 | e = "The '%s' trait of %s instance must be %s, but a value of %s was specified." \ |
|
392 | e = "The '%s' trait of %s instance must be %s, but a value of %s was specified." \ | |
404 | % (self.name, class_of(obj), |
|
393 | % (self.name, class_of(obj), | |
405 | self.info(), repr_type(value)) |
|
394 | self.info(), repr_type(value)) | |
406 | else: |
|
395 | else: | |
407 | e = "The '%s' trait must be %s, but a value of %r was specified." \ |
|
396 | e = "The '%s' trait must be %s, but a value of %r was specified." \ | |
408 | % (self.name, self.info(), repr_type(value)) |
|
397 | % (self.name, self.info(), repr_type(value)) | |
409 | raise TraitError(e) |
|
398 | raise TraitError(e) | |
410 |
|
399 | |||
411 | def get_metadata(self, key): |
|
400 | def get_metadata(self, key): | |
412 | return getattr(self, '_metadata', {}).get(key, None) |
|
401 | return getattr(self, '_metadata', {}).get(key, None) | |
413 |
|
402 | |||
414 | def set_metadata(self, key, value): |
|
403 | def set_metadata(self, key, value): | |
415 | getattr(self, '_metadata', {})[key] = value |
|
404 | getattr(self, '_metadata', {})[key] = value | |
416 |
|
405 | |||
417 |
|
406 | |||
418 | #----------------------------------------------------------------------------- |
|
407 | #----------------------------------------------------------------------------- | |
419 | # The HasTraits implementation |
|
408 | # The HasTraits implementation | |
420 | #----------------------------------------------------------------------------- |
|
409 | #----------------------------------------------------------------------------- | |
421 |
|
410 | |||
422 |
|
411 | |||
423 | class MetaHasTraits(type): |
|
412 | class MetaHasTraits(type): | |
424 | """A metaclass for HasTraits. |
|
413 | """A metaclass for HasTraits. | |
425 |
|
414 | |||
426 | This metaclass makes sure that any TraitType class attributes are |
|
415 | This metaclass makes sure that any TraitType class attributes are | |
427 | instantiated and sets their name attribute. |
|
416 | instantiated and sets their name attribute. | |
428 | """ |
|
417 | """ | |
429 |
|
418 | |||
430 | def __new__(mcls, name, bases, classdict): |
|
419 | def __new__(mcls, name, bases, classdict): | |
431 | """Create the HasTraits class. |
|
420 | """Create the HasTraits class. | |
432 |
|
421 | |||
433 | This instantiates all TraitTypes in the class dict and sets their |
|
422 | This instantiates all TraitTypes in the class dict and sets their | |
434 | :attr:`name` attribute. |
|
423 | :attr:`name` attribute. | |
435 | """ |
|
424 | """ | |
436 | # print "MetaHasTraitlets (mcls, name): ", mcls, name |
|
425 | # print "MetaHasTraitlets (mcls, name): ", mcls, name | |
437 | # print "MetaHasTraitlets (bases): ", bases |
|
426 | # print "MetaHasTraitlets (bases): ", bases | |
438 | # print "MetaHasTraitlets (classdict): ", classdict |
|
427 | # print "MetaHasTraitlets (classdict): ", classdict | |
439 | for k,v in iteritems(classdict): |
|
428 | for k,v in iteritems(classdict): | |
440 | if isinstance(v, TraitType): |
|
429 | if isinstance(v, TraitType): | |
441 | v.name = k |
|
430 | v.name = k | |
442 | elif inspect.isclass(v): |
|
431 | elif inspect.isclass(v): | |
443 | if issubclass(v, TraitType): |
|
432 | if issubclass(v, TraitType): | |
444 | vinst = v() |
|
433 | vinst = v() | |
445 | vinst.name = k |
|
434 | vinst.name = k | |
446 | classdict[k] = vinst |
|
435 | classdict[k] = vinst | |
447 | return super(MetaHasTraits, mcls).__new__(mcls, name, bases, classdict) |
|
436 | return super(MetaHasTraits, mcls).__new__(mcls, name, bases, classdict) | |
448 |
|
437 | |||
449 | def __init__(cls, name, bases, classdict): |
|
438 | def __init__(cls, name, bases, classdict): | |
450 | """Finish initializing the HasTraits class. |
|
439 | """Finish initializing the HasTraits class. | |
451 |
|
440 | |||
452 | This sets the :attr:`this_class` attribute of each TraitType in the |
|
441 | This sets the :attr:`this_class` attribute of each TraitType in the | |
453 | class dict to the newly created class ``cls``. |
|
442 | class dict to the newly created class ``cls``. | |
454 | """ |
|
443 | """ | |
455 | for k, v in iteritems(classdict): |
|
444 | for k, v in iteritems(classdict): | |
456 | if isinstance(v, TraitType): |
|
445 | if isinstance(v, TraitType): | |
457 | v.this_class = cls |
|
446 | v.this_class = cls | |
458 | super(MetaHasTraits, cls).__init__(name, bases, classdict) |
|
447 | super(MetaHasTraits, cls).__init__(name, bases, classdict) | |
459 |
|
448 | |||
460 | class HasTraits(py3compat.with_metaclass(MetaHasTraits, object)): |
|
449 | class HasTraits(py3compat.with_metaclass(MetaHasTraits, object)): | |
461 |
|
450 | |||
462 | def __new__(cls, *args, **kw): |
|
451 | def __new__(cls, *args, **kw): | |
463 | # This is needed because in Python 2.6 object.__new__ only accepts |
|
452 | # This is needed because in Python 2.6 object.__new__ only accepts | |
464 | # the cls argument. |
|
453 | # the cls argument. | |
465 | new_meth = super(HasTraits, cls).__new__ |
|
454 | new_meth = super(HasTraits, cls).__new__ | |
466 | if new_meth is object.__new__: |
|
455 | if new_meth is object.__new__: | |
467 | inst = new_meth(cls) |
|
456 | inst = new_meth(cls) | |
468 | else: |
|
457 | else: | |
469 | inst = new_meth(cls, **kw) |
|
458 | inst = new_meth(cls, **kw) | |
470 | inst._trait_values = {} |
|
459 | inst._trait_values = {} | |
471 | inst._trait_notifiers = {} |
|
460 | inst._trait_notifiers = {} | |
472 | inst._trait_dyn_inits = {} |
|
461 | inst._trait_dyn_inits = {} | |
473 | # Here we tell all the TraitType instances to set their default |
|
462 | # Here we tell all the TraitType instances to set their default | |
474 | # values on the instance. |
|
463 | # values on the instance. | |
475 | for key in dir(cls): |
|
464 | for key in dir(cls): | |
476 | # Some descriptors raise AttributeError like zope.interface's |
|
465 | # Some descriptors raise AttributeError like zope.interface's | |
477 | # __provides__ attributes even though they exist. This causes |
|
466 | # __provides__ attributes even though they exist. This causes | |
478 | # AttributeErrors even though they are listed in dir(cls). |
|
467 | # AttributeErrors even though they are listed in dir(cls). | |
479 | try: |
|
468 | try: | |
480 | value = getattr(cls, key) |
|
469 | value = getattr(cls, key) | |
481 | except AttributeError: |
|
470 | except AttributeError: | |
482 | pass |
|
471 | pass | |
483 | else: |
|
472 | else: | |
484 | if isinstance(value, TraitType): |
|
473 | if isinstance(value, TraitType): | |
485 | value.instance_init(inst) |
|
474 | value.instance_init(inst) | |
486 |
|
475 | |||
487 | return inst |
|
476 | return inst | |
488 |
|
477 | |||
489 | def __init__(self, *args, **kw): |
|
478 | def __init__(self, *args, **kw): | |
490 | # Allow trait values to be set using keyword arguments. |
|
479 | # Allow trait values to be set using keyword arguments. | |
491 | # We need to use setattr for this to trigger validation and |
|
480 | # We need to use setattr for this to trigger validation and | |
492 | # notifications. |
|
481 | # notifications. | |
493 | for key, value in iteritems(kw): |
|
482 | for key, value in iteritems(kw): | |
494 | setattr(self, key, value) |
|
483 | setattr(self, key, value) | |
495 |
|
484 | |||
496 | def _notify_trait(self, name, old_value, new_value): |
|
485 | def _notify_trait(self, name, old_value, new_value): | |
497 |
|
486 | |||
498 | # First dynamic ones |
|
487 | # First dynamic ones | |
499 | callables = [] |
|
488 | callables = [] | |
500 | callables.extend(self._trait_notifiers.get(name,[])) |
|
489 | callables.extend(self._trait_notifiers.get(name,[])) | |
501 | callables.extend(self._trait_notifiers.get('anytrait',[])) |
|
490 | callables.extend(self._trait_notifiers.get('anytrait',[])) | |
502 |
|
491 | |||
503 | # Now static ones |
|
492 | # Now static ones | |
504 | try: |
|
493 | try: | |
505 | cb = getattr(self, '_%s_changed' % name) |
|
494 | cb = getattr(self, '_%s_changed' % name) | |
506 | except: |
|
495 | except: | |
507 | pass |
|
496 | pass | |
508 | else: |
|
497 | else: | |
509 | callables.append(cb) |
|
498 | callables.append(cb) | |
510 |
|
499 | |||
511 | # Call them all now |
|
500 | # Call them all now | |
512 | for c in callables: |
|
501 | for c in callables: | |
513 | # Traits catches and logs errors here. I allow them to raise |
|
502 | # Traits catches and logs errors here. I allow them to raise | |
514 | if callable(c): |
|
503 | if callable(c): | |
515 | argspec = inspect.getargspec(c) |
|
504 | argspec = inspect.getargspec(c) | |
516 | nargs = len(argspec[0]) |
|
505 | nargs = len(argspec[0]) | |
517 | # Bound methods have an additional 'self' argument |
|
506 | # Bound methods have an additional 'self' argument | |
518 | # I don't know how to treat unbound methods, but they |
|
507 | # I don't know how to treat unbound methods, but they | |
519 | # can't really be used for callbacks. |
|
508 | # can't really be used for callbacks. | |
520 | if isinstance(c, types.MethodType): |
|
509 | if isinstance(c, types.MethodType): | |
521 | offset = -1 |
|
510 | offset = -1 | |
522 | else: |
|
511 | else: | |
523 | offset = 0 |
|
512 | offset = 0 | |
524 | if nargs + offset == 0: |
|
513 | if nargs + offset == 0: | |
525 | c() |
|
514 | c() | |
526 | elif nargs + offset == 1: |
|
515 | elif nargs + offset == 1: | |
527 | c(name) |
|
516 | c(name) | |
528 | elif nargs + offset == 2: |
|
517 | elif nargs + offset == 2: | |
529 | c(name, new_value) |
|
518 | c(name, new_value) | |
530 | elif nargs + offset == 3: |
|
519 | elif nargs + offset == 3: | |
531 | c(name, old_value, new_value) |
|
520 | c(name, old_value, new_value) | |
532 | else: |
|
521 | else: | |
533 | raise TraitError('a trait changed callback ' |
|
522 | raise TraitError('a trait changed callback ' | |
534 | 'must have 0-3 arguments.') |
|
523 | 'must have 0-3 arguments.') | |
535 | else: |
|
524 | else: | |
536 | raise TraitError('a trait changed callback ' |
|
525 | raise TraitError('a trait changed callback ' | |
537 | 'must be callable.') |
|
526 | 'must be callable.') | |
538 |
|
527 | |||
539 |
|
528 | |||
540 | def _add_notifiers(self, handler, name): |
|
529 | def _add_notifiers(self, handler, name): | |
541 | if name not in self._trait_notifiers: |
|
530 | if name not in self._trait_notifiers: | |
542 | nlist = [] |
|
531 | nlist = [] | |
543 | self._trait_notifiers[name] = nlist |
|
532 | self._trait_notifiers[name] = nlist | |
544 | else: |
|
533 | else: | |
545 | nlist = self._trait_notifiers[name] |
|
534 | nlist = self._trait_notifiers[name] | |
546 | if handler not in nlist: |
|
535 | if handler not in nlist: | |
547 | nlist.append(handler) |
|
536 | nlist.append(handler) | |
548 |
|
537 | |||
549 | def _remove_notifiers(self, handler, name): |
|
538 | def _remove_notifiers(self, handler, name): | |
550 | if name in self._trait_notifiers: |
|
539 | if name in self._trait_notifiers: | |
551 | nlist = self._trait_notifiers[name] |
|
540 | nlist = self._trait_notifiers[name] | |
552 | try: |
|
541 | try: | |
553 | index = nlist.index(handler) |
|
542 | index = nlist.index(handler) | |
554 | except ValueError: |
|
543 | except ValueError: | |
555 | pass |
|
544 | pass | |
556 | else: |
|
545 | else: | |
557 | del nlist[index] |
|
546 | del nlist[index] | |
558 |
|
547 | |||
559 | def on_trait_change(self, handler, name=None, remove=False): |
|
548 | def on_trait_change(self, handler, name=None, remove=False): | |
560 | """Setup a handler to be called when a trait changes. |
|
549 | """Setup a handler to be called when a trait changes. | |
561 |
|
550 | |||
562 | This is used to setup dynamic notifications of trait changes. |
|
551 | This is used to setup dynamic notifications of trait changes. | |
563 |
|
552 | |||
564 | Static handlers can be created by creating methods on a HasTraits |
|
553 | Static handlers can be created by creating methods on a HasTraits | |
565 | subclass with the naming convention '_[traitname]_changed'. Thus, |
|
554 | subclass with the naming convention '_[traitname]_changed'. Thus, | |
566 | to create static handler for the trait 'a', create the method |
|
555 | to create static handler for the trait 'a', create the method | |
567 | _a_changed(self, name, old, new) (fewer arguments can be used, see |
|
556 | _a_changed(self, name, old, new) (fewer arguments can be used, see | |
568 | below). |
|
557 | below). | |
569 |
|
558 | |||
570 | Parameters |
|
559 | Parameters | |
571 | ---------- |
|
560 | ---------- | |
572 | handler : callable |
|
561 | handler : callable | |
573 | A callable that is called when a trait changes. Its |
|
562 | A callable that is called when a trait changes. Its | |
574 | signature can be handler(), handler(name), handler(name, new) |
|
563 | signature can be handler(), handler(name), handler(name, new) | |
575 | or handler(name, old, new). |
|
564 | or handler(name, old, new). | |
576 | name : list, str, None |
|
565 | name : list, str, None | |
577 | If None, the handler will apply to all traits. If a list |
|
566 | If None, the handler will apply to all traits. If a list | |
578 | of str, handler will apply to all names in the list. If a |
|
567 | of str, handler will apply to all names in the list. If a | |
579 | str, the handler will apply just to that name. |
|
568 | str, the handler will apply just to that name. | |
580 | remove : bool |
|
569 | remove : bool | |
581 | If False (the default), then install the handler. If True |
|
570 | If False (the default), then install the handler. If True | |
582 | then unintall it. |
|
571 | then unintall it. | |
583 | """ |
|
572 | """ | |
584 | if remove: |
|
573 | if remove: | |
585 | names = parse_notifier_name(name) |
|
574 | names = parse_notifier_name(name) | |
586 | for n in names: |
|
575 | for n in names: | |
587 | self._remove_notifiers(handler, n) |
|
576 | self._remove_notifiers(handler, n) | |
588 | else: |
|
577 | else: | |
589 | names = parse_notifier_name(name) |
|
578 | names = parse_notifier_name(name) | |
590 | for n in names: |
|
579 | for n in names: | |
591 | self._add_notifiers(handler, n) |
|
580 | self._add_notifiers(handler, n) | |
592 |
|
581 | |||
593 | @classmethod |
|
582 | @classmethod | |
594 | def class_trait_names(cls, **metadata): |
|
583 | def class_trait_names(cls, **metadata): | |
595 | """Get a list of all the names of this class' traits. |
|
584 | """Get a list of all the names of this class' traits. | |
596 |
|
585 | |||
597 | This method is just like the :meth:`trait_names` method, |
|
586 | This method is just like the :meth:`trait_names` method, | |
598 | but is unbound. |
|
587 | but is unbound. | |
599 | """ |
|
588 | """ | |
600 | return cls.class_traits(**metadata).keys() |
|
589 | return cls.class_traits(**metadata).keys() | |
601 |
|
590 | |||
602 | @classmethod |
|
591 | @classmethod | |
603 | def class_traits(cls, **metadata): |
|
592 | def class_traits(cls, **metadata): | |
604 | """Get a `dict` of all the traits of this class. The dictionary |
|
593 | """Get a `dict` of all the traits of this class. The dictionary | |
605 | is keyed on the name and the values are the TraitType objects. |
|
594 | is keyed on the name and the values are the TraitType objects. | |
606 |
|
595 | |||
607 | This method is just like the :meth:`traits` method, but is unbound. |
|
596 | This method is just like the :meth:`traits` method, but is unbound. | |
608 |
|
597 | |||
609 | The TraitTypes returned don't know anything about the values |
|
598 | The TraitTypes returned don't know anything about the values | |
610 | that the various HasTrait's instances are holding. |
|
599 | that the various HasTrait's instances are holding. | |
611 |
|
600 | |||
612 | The metadata kwargs allow functions to be passed in which |
|
601 | The metadata kwargs allow functions to be passed in which | |
613 | filter traits based on metadata values. The functions should |
|
602 | filter traits based on metadata values. The functions should | |
614 | take a single value as an argument and return a boolean. If |
|
603 | take a single value as an argument and return a boolean. If | |
615 | any function returns False, then the trait is not included in |
|
604 | any function returns False, then the trait is not included in | |
616 | the output. This does not allow for any simple way of |
|
605 | the output. This does not allow for any simple way of | |
617 | testing that a metadata name exists and has any |
|
606 | testing that a metadata name exists and has any | |
618 | value because get_metadata returns None if a metadata key |
|
607 | value because get_metadata returns None if a metadata key | |
619 | doesn't exist. |
|
608 | doesn't exist. | |
620 | """ |
|
609 | """ | |
621 | traits = dict([memb for memb in getmembers(cls) if |
|
610 | traits = dict([memb for memb in getmembers(cls) if | |
622 | isinstance(memb[1], TraitType)]) |
|
611 | isinstance(memb[1], TraitType)]) | |
623 |
|
612 | |||
624 | if len(metadata) == 0: |
|
613 | if len(metadata) == 0: | |
625 | return traits |
|
614 | return traits | |
626 |
|
615 | |||
627 | for meta_name, meta_eval in metadata.items(): |
|
616 | for meta_name, meta_eval in metadata.items(): | |
628 | if type(meta_eval) is not FunctionType: |
|
617 | if type(meta_eval) is not FunctionType: | |
629 | metadata[meta_name] = _SimpleTest(meta_eval) |
|
618 | metadata[meta_name] = _SimpleTest(meta_eval) | |
630 |
|
619 | |||
631 | result = {} |
|
620 | result = {} | |
632 | for name, trait in traits.items(): |
|
621 | for name, trait in traits.items(): | |
633 | for meta_name, meta_eval in metadata.items(): |
|
622 | for meta_name, meta_eval in metadata.items(): | |
634 | if not meta_eval(trait.get_metadata(meta_name)): |
|
623 | if not meta_eval(trait.get_metadata(meta_name)): | |
635 | break |
|
624 | break | |
636 | else: |
|
625 | else: | |
637 | result[name] = trait |
|
626 | result[name] = trait | |
638 |
|
627 | |||
639 | return result |
|
628 | return result | |
640 |
|
629 | |||
641 | def trait_names(self, **metadata): |
|
630 | def trait_names(self, **metadata): | |
642 | """Get a list of all the names of this class' traits.""" |
|
631 | """Get a list of all the names of this class' traits.""" | |
643 | return self.traits(**metadata).keys() |
|
632 | return self.traits(**metadata).keys() | |
644 |
|
633 | |||
645 | def traits(self, **metadata): |
|
634 | def traits(self, **metadata): | |
646 | """Get a `dict` of all the traits of this class. The dictionary |
|
635 | """Get a `dict` of all the traits of this class. The dictionary | |
647 | is keyed on the name and the values are the TraitType objects. |
|
636 | is keyed on the name and the values are the TraitType objects. | |
648 |
|
637 | |||
649 | The TraitTypes returned don't know anything about the values |
|
638 | The TraitTypes returned don't know anything about the values | |
650 | that the various HasTrait's instances are holding. |
|
639 | that the various HasTrait's instances are holding. | |
651 |
|
640 | |||
652 | The metadata kwargs allow functions to be passed in which |
|
641 | The metadata kwargs allow functions to be passed in which | |
653 | filter traits based on metadata values. The functions should |
|
642 | filter traits based on metadata values. The functions should | |
654 | take a single value as an argument and return a boolean. If |
|
643 | take a single value as an argument and return a boolean. If | |
655 | any function returns False, then the trait is not included in |
|
644 | any function returns False, then the trait is not included in | |
656 | the output. This does not allow for any simple way of |
|
645 | the output. This does not allow for any simple way of | |
657 | testing that a metadata name exists and has any |
|
646 | testing that a metadata name exists and has any | |
658 | value because get_metadata returns None if a metadata key |
|
647 | value because get_metadata returns None if a metadata key | |
659 | doesn't exist. |
|
648 | doesn't exist. | |
660 | """ |
|
649 | """ | |
661 | traits = dict([memb for memb in getmembers(self.__class__) if |
|
650 | traits = dict([memb for memb in getmembers(self.__class__) if | |
662 | isinstance(memb[1], TraitType)]) |
|
651 | isinstance(memb[1], TraitType)]) | |
663 |
|
652 | |||
664 | if len(metadata) == 0: |
|
653 | if len(metadata) == 0: | |
665 | return traits |
|
654 | return traits | |
666 |
|
655 | |||
667 | for meta_name, meta_eval in metadata.items(): |
|
656 | for meta_name, meta_eval in metadata.items(): | |
668 | if type(meta_eval) is not FunctionType: |
|
657 | if type(meta_eval) is not FunctionType: | |
669 | metadata[meta_name] = _SimpleTest(meta_eval) |
|
658 | metadata[meta_name] = _SimpleTest(meta_eval) | |
670 |
|
659 | |||
671 | result = {} |
|
660 | result = {} | |
672 | for name, trait in traits.items(): |
|
661 | for name, trait in traits.items(): | |
673 | for meta_name, meta_eval in metadata.items(): |
|
662 | for meta_name, meta_eval in metadata.items(): | |
674 | if not meta_eval(trait.get_metadata(meta_name)): |
|
663 | if not meta_eval(trait.get_metadata(meta_name)): | |
675 | break |
|
664 | break | |
676 | else: |
|
665 | else: | |
677 | result[name] = trait |
|
666 | result[name] = trait | |
678 |
|
667 | |||
679 | return result |
|
668 | return result | |
680 |
|
669 | |||
681 | def trait_metadata(self, traitname, key): |
|
670 | def trait_metadata(self, traitname, key): | |
682 | """Get metadata values for trait by key.""" |
|
671 | """Get metadata values for trait by key.""" | |
683 | try: |
|
672 | try: | |
684 | trait = getattr(self.__class__, traitname) |
|
673 | trait = getattr(self.__class__, traitname) | |
685 | except AttributeError: |
|
674 | except AttributeError: | |
686 | raise TraitError("Class %s does not have a trait named %s" % |
|
675 | raise TraitError("Class %s does not have a trait named %s" % | |
687 | (self.__class__.__name__, traitname)) |
|
676 | (self.__class__.__name__, traitname)) | |
688 | else: |
|
677 | else: | |
689 | return trait.get_metadata(key) |
|
678 | return trait.get_metadata(key) | |
690 |
|
679 | |||
691 | #----------------------------------------------------------------------------- |
|
680 | #----------------------------------------------------------------------------- | |
692 | # Actual TraitTypes implementations/subclasses |
|
681 | # Actual TraitTypes implementations/subclasses | |
693 | #----------------------------------------------------------------------------- |
|
682 | #----------------------------------------------------------------------------- | |
694 |
|
683 | |||
695 | #----------------------------------------------------------------------------- |
|
684 | #----------------------------------------------------------------------------- | |
696 | # TraitTypes subclasses for handling classes and instances of classes |
|
685 | # TraitTypes subclasses for handling classes and instances of classes | |
697 | #----------------------------------------------------------------------------- |
|
686 | #----------------------------------------------------------------------------- | |
698 |
|
687 | |||
699 |
|
688 | |||
700 | class ClassBasedTraitType(TraitType): |
|
689 | class ClassBasedTraitType(TraitType): | |
701 | """A trait with error reporting for Type, Instance and This.""" |
|
690 | """A trait with error reporting for Type, Instance and This.""" | |
702 |
|
691 | |||
703 | def error(self, obj, value): |
|
692 | def error(self, obj, value): | |
704 | kind = type(value) |
|
693 | kind = type(value) | |
705 | if (not py3compat.PY3) and kind is InstanceType: |
|
694 | if (not py3compat.PY3) and kind is InstanceType: | |
706 | msg = 'class %s' % value.__class__.__name__ |
|
695 | msg = 'class %s' % value.__class__.__name__ | |
707 | else: |
|
696 | else: | |
708 | msg = '%s (i.e. %s)' % ( str( kind )[1:-1], repr( value ) ) |
|
697 | msg = '%s (i.e. %s)' % ( str( kind )[1:-1], repr( value ) ) | |
709 |
|
698 | |||
710 | if obj is not None: |
|
699 | if obj is not None: | |
711 | e = "The '%s' trait of %s instance must be %s, but a value of %s was specified." \ |
|
700 | e = "The '%s' trait of %s instance must be %s, but a value of %s was specified." \ | |
712 | % (self.name, class_of(obj), |
|
701 | % (self.name, class_of(obj), | |
713 | self.info(), msg) |
|
702 | self.info(), msg) | |
714 | else: |
|
703 | else: | |
715 | e = "The '%s' trait must be %s, but a value of %r was specified." \ |
|
704 | e = "The '%s' trait must be %s, but a value of %r was specified." \ | |
716 | % (self.name, self.info(), msg) |
|
705 | % (self.name, self.info(), msg) | |
717 |
|
706 | |||
718 | raise TraitError(e) |
|
707 | raise TraitError(e) | |
719 |
|
708 | |||
720 |
|
709 | |||
721 | class Type(ClassBasedTraitType): |
|
710 | class Type(ClassBasedTraitType): | |
722 | """A trait whose value must be a subclass of a specified class.""" |
|
711 | """A trait whose value must be a subclass of a specified class.""" | |
723 |
|
712 | |||
724 | def __init__ (self, default_value=None, klass=None, allow_none=True, **metadata ): |
|
713 | def __init__ (self, default_value=None, klass=None, allow_none=True, **metadata ): | |
725 | """Construct a Type trait |
|
714 | """Construct a Type trait | |
726 |
|
715 | |||
727 | A Type trait specifies that its values must be subclasses of |
|
716 | A Type trait specifies that its values must be subclasses of | |
728 | a particular class. |
|
717 | a particular class. | |
729 |
|
718 | |||
730 | If only ``default_value`` is given, it is used for the ``klass`` as |
|
719 | If only ``default_value`` is given, it is used for the ``klass`` as | |
731 | well. |
|
720 | well. | |
732 |
|
721 | |||
733 | Parameters |
|
722 | Parameters | |
734 | ---------- |
|
723 | ---------- | |
735 | default_value : class, str or None |
|
724 | default_value : class, str or None | |
736 | The default value must be a subclass of klass. If an str, |
|
725 | The default value must be a subclass of klass. If an str, | |
737 | the str must be a fully specified class name, like 'foo.bar.Bah'. |
|
726 | the str must be a fully specified class name, like 'foo.bar.Bah'. | |
738 | The string is resolved into real class, when the parent |
|
727 | The string is resolved into real class, when the parent | |
739 | :class:`HasTraits` class is instantiated. |
|
728 | :class:`HasTraits` class is instantiated. | |
740 | klass : class, str, None |
|
729 | klass : class, str, None | |
741 | Values of this trait must be a subclass of klass. The klass |
|
730 | Values of this trait must be a subclass of klass. The klass | |
742 | may be specified in a string like: 'foo.bar.MyClass'. |
|
731 | may be specified in a string like: 'foo.bar.MyClass'. | |
743 | The string is resolved into real class, when the parent |
|
732 | The string is resolved into real class, when the parent | |
744 | :class:`HasTraits` class is instantiated. |
|
733 | :class:`HasTraits` class is instantiated. | |
745 | allow_none : boolean |
|
734 | allow_none : boolean | |
746 | Indicates whether None is allowed as an assignable value. Even if |
|
735 | Indicates whether None is allowed as an assignable value. Even if | |
747 | ``False``, the default value may be ``None``. |
|
736 | ``False``, the default value may be ``None``. | |
748 | """ |
|
737 | """ | |
749 | if default_value is None: |
|
738 | if default_value is None: | |
750 | if klass is None: |
|
739 | if klass is None: | |
751 | klass = object |
|
740 | klass = object | |
752 | elif klass is None: |
|
741 | elif klass is None: | |
753 | klass = default_value |
|
742 | klass = default_value | |
754 |
|
743 | |||
755 | if not (inspect.isclass(klass) or isinstance(klass, py3compat.string_types)): |
|
744 | if not (inspect.isclass(klass) or isinstance(klass, py3compat.string_types)): | |
756 | raise TraitError("A Type trait must specify a class.") |
|
745 | raise TraitError("A Type trait must specify a class.") | |
757 |
|
746 | |||
758 | self.klass = klass |
|
747 | self.klass = klass | |
759 | self._allow_none = allow_none |
|
748 | self._allow_none = allow_none | |
760 |
|
749 | |||
761 | super(Type, self).__init__(default_value, **metadata) |
|
750 | super(Type, self).__init__(default_value, **metadata) | |
762 |
|
751 | |||
763 | def validate(self, obj, value): |
|
752 | def validate(self, obj, value): | |
764 | """Validates that the value is a valid object instance.""" |
|
753 | """Validates that the value is a valid object instance.""" | |
765 | try: |
|
754 | try: | |
766 | if issubclass(value, self.klass): |
|
755 | if issubclass(value, self.klass): | |
767 | return value |
|
756 | return value | |
768 | except: |
|
757 | except: | |
769 | if (value is None) and (self._allow_none): |
|
758 | if (value is None) and (self._allow_none): | |
770 | return value |
|
759 | return value | |
771 |
|
760 | |||
772 | self.error(obj, value) |
|
761 | self.error(obj, value) | |
773 |
|
762 | |||
774 | def info(self): |
|
763 | def info(self): | |
775 | """ Returns a description of the trait.""" |
|
764 | """ Returns a description of the trait.""" | |
776 | if isinstance(self.klass, py3compat.string_types): |
|
765 | if isinstance(self.klass, py3compat.string_types): | |
777 | klass = self.klass |
|
766 | klass = self.klass | |
778 | else: |
|
767 | else: | |
779 | klass = self.klass.__name__ |
|
768 | klass = self.klass.__name__ | |
780 | result = 'a subclass of ' + klass |
|
769 | result = 'a subclass of ' + klass | |
781 | if self._allow_none: |
|
770 | if self._allow_none: | |
782 | return result + ' or None' |
|
771 | return result + ' or None' | |
783 | return result |
|
772 | return result | |
784 |
|
773 | |||
785 | def instance_init(self, obj): |
|
774 | def instance_init(self, obj): | |
786 | self._resolve_classes() |
|
775 | self._resolve_classes() | |
787 | super(Type, self).instance_init(obj) |
|
776 | super(Type, self).instance_init(obj) | |
788 |
|
777 | |||
789 | def _resolve_classes(self): |
|
778 | def _resolve_classes(self): | |
790 | if isinstance(self.klass, py3compat.string_types): |
|
779 | if isinstance(self.klass, py3compat.string_types): | |
791 | self.klass = import_item(self.klass) |
|
780 | self.klass = import_item(self.klass) | |
792 | if isinstance(self.default_value, py3compat.string_types): |
|
781 | if isinstance(self.default_value, py3compat.string_types): | |
793 | self.default_value = import_item(self.default_value) |
|
782 | self.default_value = import_item(self.default_value) | |
794 |
|
783 | |||
795 | def get_default_value(self): |
|
784 | def get_default_value(self): | |
796 | return self.default_value |
|
785 | return self.default_value | |
797 |
|
786 | |||
798 |
|
787 | |||
799 | class DefaultValueGenerator(object): |
|
788 | class DefaultValueGenerator(object): | |
800 | """A class for generating new default value instances.""" |
|
789 | """A class for generating new default value instances.""" | |
801 |
|
790 | |||
802 | def __init__(self, *args, **kw): |
|
791 | def __init__(self, *args, **kw): | |
803 | self.args = args |
|
792 | self.args = args | |
804 | self.kw = kw |
|
793 | self.kw = kw | |
805 |
|
794 | |||
806 | def generate(self, klass): |
|
795 | def generate(self, klass): | |
807 | return klass(*self.args, **self.kw) |
|
796 | return klass(*self.args, **self.kw) | |
808 |
|
797 | |||
809 |
|
798 | |||
810 | class Instance(ClassBasedTraitType): |
|
799 | class Instance(ClassBasedTraitType): | |
811 | """A trait whose value must be an instance of a specified class. |
|
800 | """A trait whose value must be an instance of a specified class. | |
812 |
|
801 | |||
813 | The value can also be an instance of a subclass of the specified class. |
|
802 | The value can also be an instance of a subclass of the specified class. | |
814 | """ |
|
803 | """ | |
815 |
|
804 | |||
816 | def __init__(self, klass=None, args=None, kw=None, |
|
805 | def __init__(self, klass=None, args=None, kw=None, | |
817 | allow_none=True, **metadata ): |
|
806 | allow_none=True, **metadata ): | |
818 | """Construct an Instance trait. |
|
807 | """Construct an Instance trait. | |
819 |
|
808 | |||
820 | This trait allows values that are instances of a particular |
|
809 | This trait allows values that are instances of a particular | |
821 | class or its sublclasses. Our implementation is quite different |
|
810 | class or its sublclasses. Our implementation is quite different | |
822 | from that of enthough.traits as we don't allow instances to be used |
|
811 | from that of enthough.traits as we don't allow instances to be used | |
823 | for klass and we handle the ``args`` and ``kw`` arguments differently. |
|
812 | for klass and we handle the ``args`` and ``kw`` arguments differently. | |
824 |
|
813 | |||
825 | Parameters |
|
814 | Parameters | |
826 | ---------- |
|
815 | ---------- | |
827 | klass : class, str |
|
816 | klass : class, str | |
828 | The class that forms the basis for the trait. Class names |
|
817 | The class that forms the basis for the trait. Class names | |
829 | can also be specified as strings, like 'foo.bar.Bar'. |
|
818 | can also be specified as strings, like 'foo.bar.Bar'. | |
830 | args : tuple |
|
819 | args : tuple | |
831 | Positional arguments for generating the default value. |
|
820 | Positional arguments for generating the default value. | |
832 | kw : dict |
|
821 | kw : dict | |
833 | Keyword arguments for generating the default value. |
|
822 | Keyword arguments for generating the default value. | |
834 | allow_none : bool |
|
823 | allow_none : bool | |
835 | Indicates whether None is allowed as a value. |
|
824 | Indicates whether None is allowed as a value. | |
836 |
|
825 | |||
837 | Notes |
|
826 | Notes | |
838 | ----- |
|
827 | ----- | |
839 | If both ``args`` and ``kw`` are None, then the default value is None. |
|
828 | If both ``args`` and ``kw`` are None, then the default value is None. | |
840 | If ``args`` is a tuple and ``kw`` is a dict, then the default is |
|
829 | If ``args`` is a tuple and ``kw`` is a dict, then the default is | |
841 | created as ``klass(*args, **kw)``. If either ``args`` or ``kw`` is |
|
830 | created as ``klass(*args, **kw)``. If either ``args`` or ``kw`` is | |
842 | not (but not both), None is replace by ``()`` or ``{}``. |
|
831 | not (but not both), None is replace by ``()`` or ``{}``. | |
843 | """ |
|
832 | """ | |
844 |
|
833 | |||
845 | self._allow_none = allow_none |
|
834 | self._allow_none = allow_none | |
846 |
|
835 | |||
847 | if (klass is None) or (not (inspect.isclass(klass) or isinstance(klass, py3compat.string_types))): |
|
836 | if (klass is None) or (not (inspect.isclass(klass) or isinstance(klass, py3compat.string_types))): | |
848 | raise TraitError('The klass argument must be a class' |
|
837 | raise TraitError('The klass argument must be a class' | |
849 | ' you gave: %r' % klass) |
|
838 | ' you gave: %r' % klass) | |
850 | self.klass = klass |
|
839 | self.klass = klass | |
851 |
|
840 | |||
852 | # self.klass is a class, so handle default_value |
|
841 | # self.klass is a class, so handle default_value | |
853 | if args is None and kw is None: |
|
842 | if args is None and kw is None: | |
854 | default_value = None |
|
843 | default_value = None | |
855 | else: |
|
844 | else: | |
856 | if args is None: |
|
845 | if args is None: | |
857 | # kw is not None |
|
846 | # kw is not None | |
858 | args = () |
|
847 | args = () | |
859 | elif kw is None: |
|
848 | elif kw is None: | |
860 | # args is not None |
|
849 | # args is not None | |
861 | kw = {} |
|
850 | kw = {} | |
862 |
|
851 | |||
863 | if not isinstance(kw, dict): |
|
852 | if not isinstance(kw, dict): | |
864 | raise TraitError("The 'kw' argument must be a dict or None.") |
|
853 | raise TraitError("The 'kw' argument must be a dict or None.") | |
865 | if not isinstance(args, tuple): |
|
854 | if not isinstance(args, tuple): | |
866 | raise TraitError("The 'args' argument must be a tuple or None.") |
|
855 | raise TraitError("The 'args' argument must be a tuple or None.") | |
867 |
|
856 | |||
868 | default_value = DefaultValueGenerator(*args, **kw) |
|
857 | default_value = DefaultValueGenerator(*args, **kw) | |
869 |
|
858 | |||
870 | super(Instance, self).__init__(default_value, **metadata) |
|
859 | super(Instance, self).__init__(default_value, **metadata) | |
871 |
|
860 | |||
872 | def validate(self, obj, value): |
|
861 | def validate(self, obj, value): | |
873 | if value is None: |
|
862 | if value is None: | |
874 | if self._allow_none: |
|
863 | if self._allow_none: | |
875 | return value |
|
864 | return value | |
876 | self.error(obj, value) |
|
865 | self.error(obj, value) | |
877 |
|
866 | |||
878 | if isinstance(value, self.klass): |
|
867 | if isinstance(value, self.klass): | |
879 | return value |
|
868 | return value | |
880 | else: |
|
869 | else: | |
881 | self.error(obj, value) |
|
870 | self.error(obj, value) | |
882 |
|
871 | |||
883 | def info(self): |
|
872 | def info(self): | |
884 | if isinstance(self.klass, py3compat.string_types): |
|
873 | if isinstance(self.klass, py3compat.string_types): | |
885 | klass = self.klass |
|
874 | klass = self.klass | |
886 | else: |
|
875 | else: | |
887 | klass = self.klass.__name__ |
|
876 | klass = self.klass.__name__ | |
888 | result = class_of(klass) |
|
877 | result = class_of(klass) | |
889 | if self._allow_none: |
|
878 | if self._allow_none: | |
890 | return result + ' or None' |
|
879 | return result + ' or None' | |
891 |
|
880 | |||
892 | return result |
|
881 | return result | |
893 |
|
882 | |||
894 | def instance_init(self, obj): |
|
883 | def instance_init(self, obj): | |
895 | self._resolve_classes() |
|
884 | self._resolve_classes() | |
896 | super(Instance, self).instance_init(obj) |
|
885 | super(Instance, self).instance_init(obj) | |
897 |
|
886 | |||
898 | def _resolve_classes(self): |
|
887 | def _resolve_classes(self): | |
899 | if isinstance(self.klass, py3compat.string_types): |
|
888 | if isinstance(self.klass, py3compat.string_types): | |
900 | self.klass = import_item(self.klass) |
|
889 | self.klass = import_item(self.klass) | |
901 |
|
890 | |||
902 | def get_default_value(self): |
|
891 | def get_default_value(self): | |
903 | """Instantiate a default value instance. |
|
892 | """Instantiate a default value instance. | |
904 |
|
893 | |||
905 | This is called when the containing HasTraits classes' |
|
894 | This is called when the containing HasTraits classes' | |
906 | :meth:`__new__` method is called to ensure that a unique instance |
|
895 | :meth:`__new__` method is called to ensure that a unique instance | |
907 | is created for each HasTraits instance. |
|
896 | is created for each HasTraits instance. | |
908 | """ |
|
897 | """ | |
909 | dv = self.default_value |
|
898 | dv = self.default_value | |
910 | if isinstance(dv, DefaultValueGenerator): |
|
899 | if isinstance(dv, DefaultValueGenerator): | |
911 | return dv.generate(self.klass) |
|
900 | return dv.generate(self.klass) | |
912 | else: |
|
901 | else: | |
913 | return dv |
|
902 | return dv | |
914 |
|
903 | |||
915 |
|
904 | |||
916 | class This(ClassBasedTraitType): |
|
905 | class This(ClassBasedTraitType): | |
917 | """A trait for instances of the class containing this trait. |
|
906 | """A trait for instances of the class containing this trait. | |
918 |
|
907 | |||
919 | Because how how and when class bodies are executed, the ``This`` |
|
908 | Because how how and when class bodies are executed, the ``This`` | |
920 | trait can only have a default value of None. This, and because we |
|
909 | trait can only have a default value of None. This, and because we | |
921 | always validate default values, ``allow_none`` is *always* true. |
|
910 | always validate default values, ``allow_none`` is *always* true. | |
922 | """ |
|
911 | """ | |
923 |
|
912 | |||
924 | info_text = 'an instance of the same type as the receiver or None' |
|
913 | info_text = 'an instance of the same type as the receiver or None' | |
925 |
|
914 | |||
926 | def __init__(self, **metadata): |
|
915 | def __init__(self, **metadata): | |
927 | super(This, self).__init__(None, **metadata) |
|
916 | super(This, self).__init__(None, **metadata) | |
928 |
|
917 | |||
929 | def validate(self, obj, value): |
|
918 | def validate(self, obj, value): | |
930 | # What if value is a superclass of obj.__class__? This is |
|
919 | # What if value is a superclass of obj.__class__? This is | |
931 | # complicated if it was the superclass that defined the This |
|
920 | # complicated if it was the superclass that defined the This | |
932 | # trait. |
|
921 | # trait. | |
933 | if isinstance(value, self.this_class) or (value is None): |
|
922 | if isinstance(value, self.this_class) or (value is None): | |
934 | return value |
|
923 | return value | |
935 | else: |
|
924 | else: | |
936 | self.error(obj, value) |
|
925 | self.error(obj, value) | |
937 |
|
926 | |||
938 |
|
927 | |||
939 | #----------------------------------------------------------------------------- |
|
928 | #----------------------------------------------------------------------------- | |
940 | # Basic TraitTypes implementations/subclasses |
|
929 | # Basic TraitTypes implementations/subclasses | |
941 | #----------------------------------------------------------------------------- |
|
930 | #----------------------------------------------------------------------------- | |
942 |
|
931 | |||
943 |
|
932 | |||
944 | class Any(TraitType): |
|
933 | class Any(TraitType): | |
945 | default_value = None |
|
934 | default_value = None | |
946 | info_text = 'any value' |
|
935 | info_text = 'any value' | |
947 |
|
936 | |||
948 |
|
937 | |||
949 | class Int(TraitType): |
|
938 | class Int(TraitType): | |
950 | """An int trait.""" |
|
939 | """An int trait.""" | |
951 |
|
940 | |||
952 | default_value = 0 |
|
941 | default_value = 0 | |
953 | info_text = 'an int' |
|
942 | info_text = 'an int' | |
954 |
|
943 | |||
955 | def validate(self, obj, value): |
|
944 | def validate(self, obj, value): | |
956 | if isinstance(value, int): |
|
945 | if isinstance(value, int): | |
957 | return value |
|
946 | return value | |
958 | self.error(obj, value) |
|
947 | self.error(obj, value) | |
959 |
|
948 | |||
960 | class CInt(Int): |
|
949 | class CInt(Int): | |
961 | """A casting version of the int trait.""" |
|
950 | """A casting version of the int trait.""" | |
962 |
|
951 | |||
963 | def validate(self, obj, value): |
|
952 | def validate(self, obj, value): | |
964 | try: |
|
953 | try: | |
965 | return int(value) |
|
954 | return int(value) | |
966 | except: |
|
955 | except: | |
967 | self.error(obj, value) |
|
956 | self.error(obj, value) | |
968 |
|
957 | |||
969 | if py3compat.PY3: |
|
958 | if py3compat.PY3: | |
970 | Long, CLong = Int, CInt |
|
959 | Long, CLong = Int, CInt | |
971 | Integer = Int |
|
960 | Integer = Int | |
972 | else: |
|
961 | else: | |
973 | class Long(TraitType): |
|
962 | class Long(TraitType): | |
974 | """A long integer trait.""" |
|
963 | """A long integer trait.""" | |
975 |
|
964 | |||
976 | default_value = 0 |
|
965 | default_value = 0 | |
977 | info_text = 'a long' |
|
966 | info_text = 'a long' | |
978 |
|
967 | |||
979 | def validate(self, obj, value): |
|
968 | def validate(self, obj, value): | |
980 | if isinstance(value, long): |
|
969 | if isinstance(value, long): | |
981 | return value |
|
970 | return value | |
982 | if isinstance(value, int): |
|
971 | if isinstance(value, int): | |
983 | return long(value) |
|
972 | return long(value) | |
984 | self.error(obj, value) |
|
973 | self.error(obj, value) | |
985 |
|
974 | |||
986 |
|
975 | |||
987 | class CLong(Long): |
|
976 | class CLong(Long): | |
988 | """A casting version of the long integer trait.""" |
|
977 | """A casting version of the long integer trait.""" | |
989 |
|
978 | |||
990 | def validate(self, obj, value): |
|
979 | def validate(self, obj, value): | |
991 | try: |
|
980 | try: | |
992 | return long(value) |
|
981 | return long(value) | |
993 | except: |
|
982 | except: | |
994 | self.error(obj, value) |
|
983 | self.error(obj, value) | |
995 |
|
984 | |||
996 | class Integer(TraitType): |
|
985 | class Integer(TraitType): | |
997 | """An integer trait. |
|
986 | """An integer trait. | |
998 |
|
987 | |||
999 | Longs that are unnecessary (<= sys.maxint) are cast to ints.""" |
|
988 | Longs that are unnecessary (<= sys.maxint) are cast to ints.""" | |
1000 |
|
989 | |||
1001 | default_value = 0 |
|
990 | default_value = 0 | |
1002 | info_text = 'an integer' |
|
991 | info_text = 'an integer' | |
1003 |
|
992 | |||
1004 | def validate(self, obj, value): |
|
993 | def validate(self, obj, value): | |
1005 | if isinstance(value, int): |
|
994 | if isinstance(value, int): | |
1006 | return value |
|
995 | return value | |
1007 | if isinstance(value, long): |
|
996 | if isinstance(value, long): | |
1008 | # downcast longs that fit in int: |
|
997 | # downcast longs that fit in int: | |
1009 | # note that int(n > sys.maxint) returns a long, so |
|
998 | # note that int(n > sys.maxint) returns a long, so | |
1010 | # we don't need a condition on this cast |
|
999 | # we don't need a condition on this cast | |
1011 | return int(value) |
|
1000 | return int(value) | |
1012 | if sys.platform == "cli": |
|
1001 | if sys.platform == "cli": | |
1013 | from System import Int64 |
|
1002 | from System import Int64 | |
1014 | if isinstance(value, Int64): |
|
1003 | if isinstance(value, Int64): | |
1015 | return int(value) |
|
1004 | return int(value) | |
1016 | self.error(obj, value) |
|
1005 | self.error(obj, value) | |
1017 |
|
1006 | |||
1018 |
|
1007 | |||
1019 | class Float(TraitType): |
|
1008 | class Float(TraitType): | |
1020 | """A float trait.""" |
|
1009 | """A float trait.""" | |
1021 |
|
1010 | |||
1022 | default_value = 0.0 |
|
1011 | default_value = 0.0 | |
1023 | info_text = 'a float' |
|
1012 | info_text = 'a float' | |
1024 |
|
1013 | |||
1025 | def validate(self, obj, value): |
|
1014 | def validate(self, obj, value): | |
1026 | if isinstance(value, float): |
|
1015 | if isinstance(value, float): | |
1027 | return value |
|
1016 | return value | |
1028 | if isinstance(value, int): |
|
1017 | if isinstance(value, int): | |
1029 | return float(value) |
|
1018 | return float(value) | |
1030 | self.error(obj, value) |
|
1019 | self.error(obj, value) | |
1031 |
|
1020 | |||
1032 |
|
1021 | |||
1033 | class CFloat(Float): |
|
1022 | class CFloat(Float): | |
1034 | """A casting version of the float trait.""" |
|
1023 | """A casting version of the float trait.""" | |
1035 |
|
1024 | |||
1036 | def validate(self, obj, value): |
|
1025 | def validate(self, obj, value): | |
1037 | try: |
|
1026 | try: | |
1038 | return float(value) |
|
1027 | return float(value) | |
1039 | except: |
|
1028 | except: | |
1040 | self.error(obj, value) |
|
1029 | self.error(obj, value) | |
1041 |
|
1030 | |||
1042 | class Complex(TraitType): |
|
1031 | class Complex(TraitType): | |
1043 | """A trait for complex numbers.""" |
|
1032 | """A trait for complex numbers.""" | |
1044 |
|
1033 | |||
1045 | default_value = 0.0 + 0.0j |
|
1034 | default_value = 0.0 + 0.0j | |
1046 | info_text = 'a complex number' |
|
1035 | info_text = 'a complex number' | |
1047 |
|
1036 | |||
1048 | def validate(self, obj, value): |
|
1037 | def validate(self, obj, value): | |
1049 | if isinstance(value, complex): |
|
1038 | if isinstance(value, complex): | |
1050 | return value |
|
1039 | return value | |
1051 | if isinstance(value, (float, int)): |
|
1040 | if isinstance(value, (float, int)): | |
1052 | return complex(value) |
|
1041 | return complex(value) | |
1053 | self.error(obj, value) |
|
1042 | self.error(obj, value) | |
1054 |
|
1043 | |||
1055 |
|
1044 | |||
1056 | class CComplex(Complex): |
|
1045 | class CComplex(Complex): | |
1057 | """A casting version of the complex number trait.""" |
|
1046 | """A casting version of the complex number trait.""" | |
1058 |
|
1047 | |||
1059 | def validate (self, obj, value): |
|
1048 | def validate (self, obj, value): | |
1060 | try: |
|
1049 | try: | |
1061 | return complex(value) |
|
1050 | return complex(value) | |
1062 | except: |
|
1051 | except: | |
1063 | self.error(obj, value) |
|
1052 | self.error(obj, value) | |
1064 |
|
1053 | |||
1065 | # We should always be explicit about whether we're using bytes or unicode, both |
|
1054 | # We should always be explicit about whether we're using bytes or unicode, both | |
1066 | # for Python 3 conversion and for reliable unicode behaviour on Python 2. So |
|
1055 | # for Python 3 conversion and for reliable unicode behaviour on Python 2. So | |
1067 | # we don't have a Str type. |
|
1056 | # we don't have a Str type. | |
1068 | class Bytes(TraitType): |
|
1057 | class Bytes(TraitType): | |
1069 | """A trait for byte strings.""" |
|
1058 | """A trait for byte strings.""" | |
1070 |
|
1059 | |||
1071 | default_value = b'' |
|
1060 | default_value = b'' | |
1072 | info_text = 'a bytes object' |
|
1061 | info_text = 'a bytes object' | |
1073 |
|
1062 | |||
1074 | def validate(self, obj, value): |
|
1063 | def validate(self, obj, value): | |
1075 | if isinstance(value, bytes): |
|
1064 | if isinstance(value, bytes): | |
1076 | return value |
|
1065 | return value | |
1077 | self.error(obj, value) |
|
1066 | self.error(obj, value) | |
1078 |
|
1067 | |||
1079 |
|
1068 | |||
1080 | class CBytes(Bytes): |
|
1069 | class CBytes(Bytes): | |
1081 | """A casting version of the byte string trait.""" |
|
1070 | """A casting version of the byte string trait.""" | |
1082 |
|
1071 | |||
1083 | def validate(self, obj, value): |
|
1072 | def validate(self, obj, value): | |
1084 | try: |
|
1073 | try: | |
1085 | return bytes(value) |
|
1074 | return bytes(value) | |
1086 | except: |
|
1075 | except: | |
1087 | self.error(obj, value) |
|
1076 | self.error(obj, value) | |
1088 |
|
1077 | |||
1089 |
|
1078 | |||
1090 | class Unicode(TraitType): |
|
1079 | class Unicode(TraitType): | |
1091 | """A trait for unicode strings.""" |
|
1080 | """A trait for unicode strings.""" | |
1092 |
|
1081 | |||
1093 | default_value = u'' |
|
1082 | default_value = u'' | |
1094 | info_text = 'a unicode string' |
|
1083 | info_text = 'a unicode string' | |
1095 |
|
1084 | |||
1096 | def validate(self, obj, value): |
|
1085 | def validate(self, obj, value): | |
1097 | if isinstance(value, py3compat.unicode_type): |
|
1086 | if isinstance(value, py3compat.unicode_type): | |
1098 | return value |
|
1087 | return value | |
1099 | if isinstance(value, bytes): |
|
1088 | if isinstance(value, bytes): | |
1100 | try: |
|
1089 | try: | |
1101 | return value.decode('ascii', 'strict') |
|
1090 | return value.decode('ascii', 'strict') | |
1102 | except UnicodeDecodeError: |
|
1091 | except UnicodeDecodeError: | |
1103 | msg = "Could not decode {!r} for unicode trait '{}' of {} instance." |
|
1092 | msg = "Could not decode {!r} for unicode trait '{}' of {} instance." | |
1104 | raise TraitError(msg.format(value, self.name, class_of(obj))) |
|
1093 | raise TraitError(msg.format(value, self.name, class_of(obj))) | |
1105 | self.error(obj, value) |
|
1094 | self.error(obj, value) | |
1106 |
|
1095 | |||
1107 |
|
1096 | |||
1108 | class CUnicode(Unicode): |
|
1097 | class CUnicode(Unicode): | |
1109 | """A casting version of the unicode trait.""" |
|
1098 | """A casting version of the unicode trait.""" | |
1110 |
|
1099 | |||
1111 | def validate(self, obj, value): |
|
1100 | def validate(self, obj, value): | |
1112 | try: |
|
1101 | try: | |
1113 | return py3compat.unicode_type(value) |
|
1102 | return py3compat.unicode_type(value) | |
1114 | except: |
|
1103 | except: | |
1115 | self.error(obj, value) |
|
1104 | self.error(obj, value) | |
1116 |
|
1105 | |||
1117 |
|
1106 | |||
1118 | class ObjectName(TraitType): |
|
1107 | class ObjectName(TraitType): | |
1119 | """A string holding a valid object name in this version of Python. |
|
1108 | """A string holding a valid object name in this version of Python. | |
1120 |
|
1109 | |||
1121 | This does not check that the name exists in any scope.""" |
|
1110 | This does not check that the name exists in any scope.""" | |
1122 | info_text = "a valid object identifier in Python" |
|
1111 | info_text = "a valid object identifier in Python" | |
1123 |
|
1112 | |||
1124 | if py3compat.PY3: |
|
1113 | if py3compat.PY3: | |
1125 | # Python 3: |
|
1114 | # Python 3: | |
1126 | coerce_str = staticmethod(lambda _,s: s) |
|
1115 | coerce_str = staticmethod(lambda _,s: s) | |
1127 |
|
1116 | |||
1128 | else: |
|
1117 | else: | |
1129 | # Python 2: |
|
1118 | # Python 2: | |
1130 | def coerce_str(self, obj, value): |
|
1119 | def coerce_str(self, obj, value): | |
1131 | "In Python 2, coerce ascii-only unicode to str" |
|
1120 | "In Python 2, coerce ascii-only unicode to str" | |
1132 | if isinstance(value, unicode): |
|
1121 | if isinstance(value, unicode): | |
1133 | try: |
|
1122 | try: | |
1134 | return str(value) |
|
1123 | return str(value) | |
1135 | except UnicodeEncodeError: |
|
1124 | except UnicodeEncodeError: | |
1136 | self.error(obj, value) |
|
1125 | self.error(obj, value) | |
1137 | return value |
|
1126 | return value | |
1138 |
|
1127 | |||
1139 | def validate(self, obj, value): |
|
1128 | def validate(self, obj, value): | |
1140 | value = self.coerce_str(obj, value) |
|
1129 | value = self.coerce_str(obj, value) | |
1141 |
|
1130 | |||
1142 | if isinstance(value, str) and py3compat.isidentifier(value): |
|
1131 | if isinstance(value, str) and py3compat.isidentifier(value): | |
1143 | return value |
|
1132 | return value | |
1144 | self.error(obj, value) |
|
1133 | self.error(obj, value) | |
1145 |
|
1134 | |||
1146 | class DottedObjectName(ObjectName): |
|
1135 | class DottedObjectName(ObjectName): | |
1147 | """A string holding a valid dotted object name in Python, such as A.b3._c""" |
|
1136 | """A string holding a valid dotted object name in Python, such as A.b3._c""" | |
1148 | def validate(self, obj, value): |
|
1137 | def validate(self, obj, value): | |
1149 | value = self.coerce_str(obj, value) |
|
1138 | value = self.coerce_str(obj, value) | |
1150 |
|
1139 | |||
1151 | if isinstance(value, str) and py3compat.isidentifier(value, dotted=True): |
|
1140 | if isinstance(value, str) and py3compat.isidentifier(value, dotted=True): | |
1152 | return value |
|
1141 | return value | |
1153 | self.error(obj, value) |
|
1142 | self.error(obj, value) | |
1154 |
|
1143 | |||
1155 |
|
1144 | |||
1156 | class Bool(TraitType): |
|
1145 | class Bool(TraitType): | |
1157 | """A boolean (True, False) trait.""" |
|
1146 | """A boolean (True, False) trait.""" | |
1158 |
|
1147 | |||
1159 | default_value = False |
|
1148 | default_value = False | |
1160 | info_text = 'a boolean' |
|
1149 | info_text = 'a boolean' | |
1161 |
|
1150 | |||
1162 | def validate(self, obj, value): |
|
1151 | def validate(self, obj, value): | |
1163 | if isinstance(value, bool): |
|
1152 | if isinstance(value, bool): | |
1164 | return value |
|
1153 | return value | |
1165 | self.error(obj, value) |
|
1154 | self.error(obj, value) | |
1166 |
|
1155 | |||
1167 |
|
1156 | |||
1168 | class CBool(Bool): |
|
1157 | class CBool(Bool): | |
1169 | """A casting version of the boolean trait.""" |
|
1158 | """A casting version of the boolean trait.""" | |
1170 |
|
1159 | |||
1171 | def validate(self, obj, value): |
|
1160 | def validate(self, obj, value): | |
1172 | try: |
|
1161 | try: | |
1173 | return bool(value) |
|
1162 | return bool(value) | |
1174 | except: |
|
1163 | except: | |
1175 | self.error(obj, value) |
|
1164 | self.error(obj, value) | |
1176 |
|
1165 | |||
1177 |
|
1166 | |||
1178 | class Enum(TraitType): |
|
1167 | class Enum(TraitType): | |
1179 | """An enum that whose value must be in a given sequence.""" |
|
1168 | """An enum that whose value must be in a given sequence.""" | |
1180 |
|
1169 | |||
1181 | def __init__(self, values, default_value=None, allow_none=True, **metadata): |
|
1170 | def __init__(self, values, default_value=None, allow_none=True, **metadata): | |
1182 | self.values = values |
|
1171 | self.values = values | |
1183 | self._allow_none = allow_none |
|
1172 | self._allow_none = allow_none | |
1184 | super(Enum, self).__init__(default_value, **metadata) |
|
1173 | super(Enum, self).__init__(default_value, **metadata) | |
1185 |
|
1174 | |||
1186 | def validate(self, obj, value): |
|
1175 | def validate(self, obj, value): | |
1187 | if value is None: |
|
1176 | if value is None: | |
1188 | if self._allow_none: |
|
1177 | if self._allow_none: | |
1189 | return value |
|
1178 | return value | |
1190 |
|
1179 | |||
1191 | if value in self.values: |
|
1180 | if value in self.values: | |
1192 | return value |
|
1181 | return value | |
1193 | self.error(obj, value) |
|
1182 | self.error(obj, value) | |
1194 |
|
1183 | |||
1195 | def info(self): |
|
1184 | def info(self): | |
1196 | """ Returns a description of the trait.""" |
|
1185 | """ Returns a description of the trait.""" | |
1197 | result = 'any of ' + repr(self.values) |
|
1186 | result = 'any of ' + repr(self.values) | |
1198 | if self._allow_none: |
|
1187 | if self._allow_none: | |
1199 | return result + ' or None' |
|
1188 | return result + ' or None' | |
1200 | return result |
|
1189 | return result | |
1201 |
|
1190 | |||
1202 | class CaselessStrEnum(Enum): |
|
1191 | class CaselessStrEnum(Enum): | |
1203 | """An enum of strings that are caseless in validate.""" |
|
1192 | """An enum of strings that are caseless in validate.""" | |
1204 |
|
1193 | |||
1205 | def validate(self, obj, value): |
|
1194 | def validate(self, obj, value): | |
1206 | if value is None: |
|
1195 | if value is None: | |
1207 | if self._allow_none: |
|
1196 | if self._allow_none: | |
1208 | return value |
|
1197 | return value | |
1209 |
|
1198 | |||
1210 | if not isinstance(value, py3compat.string_types): |
|
1199 | if not isinstance(value, py3compat.string_types): | |
1211 | self.error(obj, value) |
|
1200 | self.error(obj, value) | |
1212 |
|
1201 | |||
1213 | for v in self.values: |
|
1202 | for v in self.values: | |
1214 | if v.lower() == value.lower(): |
|
1203 | if v.lower() == value.lower(): | |
1215 | return v |
|
1204 | return v | |
1216 | self.error(obj, value) |
|
1205 | self.error(obj, value) | |
1217 |
|
1206 | |||
1218 | class Container(Instance): |
|
1207 | class Container(Instance): | |
1219 | """An instance of a container (list, set, etc.) |
|
1208 | """An instance of a container (list, set, etc.) | |
1220 |
|
1209 | |||
1221 | To be subclassed by overriding klass. |
|
1210 | To be subclassed by overriding klass. | |
1222 | """ |
|
1211 | """ | |
1223 | klass = None |
|
1212 | klass = None | |
1224 | _cast_types = () |
|
1213 | _cast_types = () | |
1225 | _valid_defaults = SequenceTypes |
|
1214 | _valid_defaults = SequenceTypes | |
1226 | _trait = None |
|
1215 | _trait = None | |
1227 |
|
1216 | |||
1228 | def __init__(self, trait=None, default_value=None, allow_none=True, |
|
1217 | def __init__(self, trait=None, default_value=None, allow_none=True, | |
1229 | **metadata): |
|
1218 | **metadata): | |
1230 | """Create a container trait type from a list, set, or tuple. |
|
1219 | """Create a container trait type from a list, set, or tuple. | |
1231 |
|
1220 | |||
1232 | The default value is created by doing ``List(default_value)``, |
|
1221 | The default value is created by doing ``List(default_value)``, | |
1233 | which creates a copy of the ``default_value``. |
|
1222 | which creates a copy of the ``default_value``. | |
1234 |
|
1223 | |||
1235 | ``trait`` can be specified, which restricts the type of elements |
|
1224 | ``trait`` can be specified, which restricts the type of elements | |
1236 | in the container to that TraitType. |
|
1225 | in the container to that TraitType. | |
1237 |
|
1226 | |||
1238 | If only one arg is given and it is not a Trait, it is taken as |
|
1227 | If only one arg is given and it is not a Trait, it is taken as | |
1239 | ``default_value``: |
|
1228 | ``default_value``: | |
1240 |
|
1229 | |||
1241 | ``c = List([1,2,3])`` |
|
1230 | ``c = List([1,2,3])`` | |
1242 |
|
1231 | |||
1243 | Parameters |
|
1232 | Parameters | |
1244 | ---------- |
|
1233 | ---------- | |
1245 |
|
1234 | |||
1246 | trait : TraitType [ optional ] |
|
1235 | trait : TraitType [ optional ] | |
1247 | the type for restricting the contents of the Container. If unspecified, |
|
1236 | the type for restricting the contents of the Container. If unspecified, | |
1248 | types are not checked. |
|
1237 | types are not checked. | |
1249 |
|
1238 | |||
1250 | default_value : SequenceType [ optional ] |
|
1239 | default_value : SequenceType [ optional ] | |
1251 | The default value for the Trait. Must be list/tuple/set, and |
|
1240 | The default value for the Trait. Must be list/tuple/set, and | |
1252 | will be cast to the container type. |
|
1241 | will be cast to the container type. | |
1253 |
|
1242 | |||
1254 | allow_none : Bool [ default True ] |
|
1243 | allow_none : Bool [ default True ] | |
1255 | Whether to allow the value to be None |
|
1244 | Whether to allow the value to be None | |
1256 |
|
1245 | |||
1257 | **metadata : any |
|
1246 | **metadata : any | |
1258 | further keys for extensions to the Trait (e.g. config) |
|
1247 | further keys for extensions to the Trait (e.g. config) | |
1259 |
|
1248 | |||
1260 | """ |
|
1249 | """ | |
1261 | # allow List([values]): |
|
1250 | # allow List([values]): | |
1262 | if default_value is None and not is_trait(trait): |
|
1251 | if default_value is None and not is_trait(trait): | |
1263 | default_value = trait |
|
1252 | default_value = trait | |
1264 | trait = None |
|
1253 | trait = None | |
1265 |
|
1254 | |||
1266 | if default_value is None: |
|
1255 | if default_value is None: | |
1267 | args = () |
|
1256 | args = () | |
1268 | elif isinstance(default_value, self._valid_defaults): |
|
1257 | elif isinstance(default_value, self._valid_defaults): | |
1269 | args = (default_value,) |
|
1258 | args = (default_value,) | |
1270 | else: |
|
1259 | else: | |
1271 | raise TypeError('default value of %s was %s' %(self.__class__.__name__, default_value)) |
|
1260 | raise TypeError('default value of %s was %s' %(self.__class__.__name__, default_value)) | |
1272 |
|
1261 | |||
1273 | if is_trait(trait): |
|
1262 | if is_trait(trait): | |
1274 | self._trait = trait() if isinstance(trait, type) else trait |
|
1263 | self._trait = trait() if isinstance(trait, type) else trait | |
1275 | self._trait.name = 'element' |
|
1264 | self._trait.name = 'element' | |
1276 | elif trait is not None: |
|
1265 | elif trait is not None: | |
1277 | raise TypeError("`trait` must be a Trait or None, got %s"%repr_type(trait)) |
|
1266 | raise TypeError("`trait` must be a Trait or None, got %s"%repr_type(trait)) | |
1278 |
|
1267 | |||
1279 | super(Container,self).__init__(klass=self.klass, args=args, |
|
1268 | super(Container,self).__init__(klass=self.klass, args=args, | |
1280 | allow_none=allow_none, **metadata) |
|
1269 | allow_none=allow_none, **metadata) | |
1281 |
|
1270 | |||
1282 | def element_error(self, obj, element, validator): |
|
1271 | def element_error(self, obj, element, validator): | |
1283 | e = "Element of the '%s' trait of %s instance must be %s, but a value of %s was specified." \ |
|
1272 | e = "Element of the '%s' trait of %s instance must be %s, but a value of %s was specified." \ | |
1284 | % (self.name, class_of(obj), validator.info(), repr_type(element)) |
|
1273 | % (self.name, class_of(obj), validator.info(), repr_type(element)) | |
1285 | raise TraitError(e) |
|
1274 | raise TraitError(e) | |
1286 |
|
1275 | |||
1287 | def validate(self, obj, value): |
|
1276 | def validate(self, obj, value): | |
1288 | if isinstance(value, self._cast_types): |
|
1277 | if isinstance(value, self._cast_types): | |
1289 | value = self.klass(value) |
|
1278 | value = self.klass(value) | |
1290 | value = super(Container, self).validate(obj, value) |
|
1279 | value = super(Container, self).validate(obj, value) | |
1291 | if value is None: |
|
1280 | if value is None: | |
1292 | return value |
|
1281 | return value | |
1293 |
|
1282 | |||
1294 | value = self.validate_elements(obj, value) |
|
1283 | value = self.validate_elements(obj, value) | |
1295 |
|
1284 | |||
1296 | return value |
|
1285 | return value | |
1297 |
|
1286 | |||
1298 | def validate_elements(self, obj, value): |
|
1287 | def validate_elements(self, obj, value): | |
1299 | validated = [] |
|
1288 | validated = [] | |
1300 | if self._trait is None or isinstance(self._trait, Any): |
|
1289 | if self._trait is None or isinstance(self._trait, Any): | |
1301 | return value |
|
1290 | return value | |
1302 | for v in value: |
|
1291 | for v in value: | |
1303 | try: |
|
1292 | try: | |
1304 | v = self._trait.validate(obj, v) |
|
1293 | v = self._trait.validate(obj, v) | |
1305 | except TraitError: |
|
1294 | except TraitError: | |
1306 | self.element_error(obj, v, self._trait) |
|
1295 | self.element_error(obj, v, self._trait) | |
1307 | else: |
|
1296 | else: | |
1308 | validated.append(v) |
|
1297 | validated.append(v) | |
1309 | return self.klass(validated) |
|
1298 | return self.klass(validated) | |
1310 |
|
1299 | |||
1311 |
|
1300 | |||
1312 | class List(Container): |
|
1301 | class List(Container): | |
1313 | """An instance of a Python list.""" |
|
1302 | """An instance of a Python list.""" | |
1314 | klass = list |
|
1303 | klass = list | |
1315 | _cast_types = (tuple,) |
|
1304 | _cast_types = (tuple,) | |
1316 |
|
1305 | |||
1317 | def __init__(self, trait=None, default_value=None, minlen=0, maxlen=sys.maxsize, |
|
1306 | def __init__(self, trait=None, default_value=None, minlen=0, maxlen=sys.maxsize, | |
1318 | allow_none=True, **metadata): |
|
1307 | allow_none=True, **metadata): | |
1319 | """Create a List trait type from a list, set, or tuple. |
|
1308 | """Create a List trait type from a list, set, or tuple. | |
1320 |
|
1309 | |||
1321 | The default value is created by doing ``List(default_value)``, |
|
1310 | The default value is created by doing ``List(default_value)``, | |
1322 | which creates a copy of the ``default_value``. |
|
1311 | which creates a copy of the ``default_value``. | |
1323 |
|
1312 | |||
1324 | ``trait`` can be specified, which restricts the type of elements |
|
1313 | ``trait`` can be specified, which restricts the type of elements | |
1325 | in the container to that TraitType. |
|
1314 | in the container to that TraitType. | |
1326 |
|
1315 | |||
1327 | If only one arg is given and it is not a Trait, it is taken as |
|
1316 | If only one arg is given and it is not a Trait, it is taken as | |
1328 | ``default_value``: |
|
1317 | ``default_value``: | |
1329 |
|
1318 | |||
1330 | ``c = List([1,2,3])`` |
|
1319 | ``c = List([1,2,3])`` | |
1331 |
|
1320 | |||
1332 | Parameters |
|
1321 | Parameters | |
1333 | ---------- |
|
1322 | ---------- | |
1334 |
|
1323 | |||
1335 | trait : TraitType [ optional ] |
|
1324 | trait : TraitType [ optional ] | |
1336 | the type for restricting the contents of the Container. If unspecified, |
|
1325 | the type for restricting the contents of the Container. If unspecified, | |
1337 | types are not checked. |
|
1326 | types are not checked. | |
1338 |
|
1327 | |||
1339 | default_value : SequenceType [ optional ] |
|
1328 | default_value : SequenceType [ optional ] | |
1340 | The default value for the Trait. Must be list/tuple/set, and |
|
1329 | The default value for the Trait. Must be list/tuple/set, and | |
1341 | will be cast to the container type. |
|
1330 | will be cast to the container type. | |
1342 |
|
1331 | |||
1343 | minlen : Int [ default 0 ] |
|
1332 | minlen : Int [ default 0 ] | |
1344 | The minimum length of the input list |
|
1333 | The minimum length of the input list | |
1345 |
|
1334 | |||
1346 | maxlen : Int [ default sys.maxsize ] |
|
1335 | maxlen : Int [ default sys.maxsize ] | |
1347 | The maximum length of the input list |
|
1336 | The maximum length of the input list | |
1348 |
|
1337 | |||
1349 | allow_none : Bool [ default True ] |
|
1338 | allow_none : Bool [ default True ] | |
1350 | Whether to allow the value to be None |
|
1339 | Whether to allow the value to be None | |
1351 |
|
1340 | |||
1352 | **metadata : any |
|
1341 | **metadata : any | |
1353 | further keys for extensions to the Trait (e.g. config) |
|
1342 | further keys for extensions to the Trait (e.g. config) | |
1354 |
|
1343 | |||
1355 | """ |
|
1344 | """ | |
1356 | self._minlen = minlen |
|
1345 | self._minlen = minlen | |
1357 | self._maxlen = maxlen |
|
1346 | self._maxlen = maxlen | |
1358 | super(List, self).__init__(trait=trait, default_value=default_value, |
|
1347 | super(List, self).__init__(trait=trait, default_value=default_value, | |
1359 | allow_none=allow_none, **metadata) |
|
1348 | allow_none=allow_none, **metadata) | |
1360 |
|
1349 | |||
1361 | def length_error(self, obj, value): |
|
1350 | def length_error(self, obj, value): | |
1362 | e = "The '%s' trait of %s instance must be of length %i <= L <= %i, but a value of %s was specified." \ |
|
1351 | e = "The '%s' trait of %s instance must be of length %i <= L <= %i, but a value of %s was specified." \ | |
1363 | % (self.name, class_of(obj), self._minlen, self._maxlen, value) |
|
1352 | % (self.name, class_of(obj), self._minlen, self._maxlen, value) | |
1364 | raise TraitError(e) |
|
1353 | raise TraitError(e) | |
1365 |
|
1354 | |||
1366 | def validate_elements(self, obj, value): |
|
1355 | def validate_elements(self, obj, value): | |
1367 | length = len(value) |
|
1356 | length = len(value) | |
1368 | if length < self._minlen or length > self._maxlen: |
|
1357 | if length < self._minlen or length > self._maxlen: | |
1369 | self.length_error(obj, value) |
|
1358 | self.length_error(obj, value) | |
1370 |
|
1359 | |||
1371 | return super(List, self).validate_elements(obj, value) |
|
1360 | return super(List, self).validate_elements(obj, value) | |
1372 |
|
1361 | |||
1373 | def validate(self, obj, value): |
|
1362 | def validate(self, obj, value): | |
1374 | value = super(List, self).validate(obj, value) |
|
1363 | value = super(List, self).validate(obj, value) | |
1375 | if value is None: |
|
1364 | if value is None: | |
1376 | return value |
|
1365 | return value | |
1377 |
|
1366 | |||
1378 | value = self.validate_elements(obj, value) |
|
1367 | value = self.validate_elements(obj, value) | |
1379 |
|
1368 | |||
1380 | return value |
|
1369 | return value | |
1381 |
|
1370 | |||
1382 |
|
1371 | |||
1383 |
|
1372 | |||
1384 | class Set(List): |
|
1373 | class Set(List): | |
1385 | """An instance of a Python set.""" |
|
1374 | """An instance of a Python set.""" | |
1386 | klass = set |
|
1375 | klass = set | |
1387 | _cast_types = (tuple, list) |
|
1376 | _cast_types = (tuple, list) | |
1388 |
|
1377 | |||
1389 | class Tuple(Container): |
|
1378 | class Tuple(Container): | |
1390 | """An instance of a Python tuple.""" |
|
1379 | """An instance of a Python tuple.""" | |
1391 | klass = tuple |
|
1380 | klass = tuple | |
1392 | _cast_types = (list,) |
|
1381 | _cast_types = (list,) | |
1393 |
|
1382 | |||
1394 | def __init__(self, *traits, **metadata): |
|
1383 | def __init__(self, *traits, **metadata): | |
1395 | """Tuple(*traits, default_value=None, allow_none=True, **medatata) |
|
1384 | """Tuple(*traits, default_value=None, allow_none=True, **medatata) | |
1396 |
|
1385 | |||
1397 | Create a tuple from a list, set, or tuple. |
|
1386 | Create a tuple from a list, set, or tuple. | |
1398 |
|
1387 | |||
1399 | Create a fixed-type tuple with Traits: |
|
1388 | Create a fixed-type tuple with Traits: | |
1400 |
|
1389 | |||
1401 | ``t = Tuple(Int, Str, CStr)`` |
|
1390 | ``t = Tuple(Int, Str, CStr)`` | |
1402 |
|
1391 | |||
1403 | would be length 3, with Int,Str,CStr for each element. |
|
1392 | would be length 3, with Int,Str,CStr for each element. | |
1404 |
|
1393 | |||
1405 | If only one arg is given and it is not a Trait, it is taken as |
|
1394 | If only one arg is given and it is not a Trait, it is taken as | |
1406 | default_value: |
|
1395 | default_value: | |
1407 |
|
1396 | |||
1408 | ``t = Tuple((1,2,3))`` |
|
1397 | ``t = Tuple((1,2,3))`` | |
1409 |
|
1398 | |||
1410 | Otherwise, ``default_value`` *must* be specified by keyword. |
|
1399 | Otherwise, ``default_value`` *must* be specified by keyword. | |
1411 |
|
1400 | |||
1412 | Parameters |
|
1401 | Parameters | |
1413 | ---------- |
|
1402 | ---------- | |
1414 |
|
1403 | |||
1415 | *traits : TraitTypes [ optional ] |
|
1404 | *traits : TraitTypes [ optional ] | |
1416 | the tsype for restricting the contents of the Tuple. If unspecified, |
|
1405 | the tsype for restricting the contents of the Tuple. If unspecified, | |
1417 | types are not checked. If specified, then each positional argument |
|
1406 | types are not checked. If specified, then each positional argument | |
1418 | corresponds to an element of the tuple. Tuples defined with traits |
|
1407 | corresponds to an element of the tuple. Tuples defined with traits | |
1419 | are of fixed length. |
|
1408 | are of fixed length. | |
1420 |
|
1409 | |||
1421 | default_value : SequenceType [ optional ] |
|
1410 | default_value : SequenceType [ optional ] | |
1422 | The default value for the Tuple. Must be list/tuple/set, and |
|
1411 | The default value for the Tuple. Must be list/tuple/set, and | |
1423 | will be cast to a tuple. If `traits` are specified, the |
|
1412 | will be cast to a tuple. If `traits` are specified, the | |
1424 | `default_value` must conform to the shape and type they specify. |
|
1413 | `default_value` must conform to the shape and type they specify. | |
1425 |
|
1414 | |||
1426 | allow_none : Bool [ default True ] |
|
1415 | allow_none : Bool [ default True ] | |
1427 | Whether to allow the value to be None |
|
1416 | Whether to allow the value to be None | |
1428 |
|
1417 | |||
1429 | **metadata : any |
|
1418 | **metadata : any | |
1430 | further keys for extensions to the Trait (e.g. config) |
|
1419 | further keys for extensions to the Trait (e.g. config) | |
1431 |
|
1420 | |||
1432 | """ |
|
1421 | """ | |
1433 | default_value = metadata.pop('default_value', None) |
|
1422 | default_value = metadata.pop('default_value', None) | |
1434 | allow_none = metadata.pop('allow_none', True) |
|
1423 | allow_none = metadata.pop('allow_none', True) | |
1435 |
|
1424 | |||
1436 | # allow Tuple((values,)): |
|
1425 | # allow Tuple((values,)): | |
1437 | if len(traits) == 1 and default_value is None and not is_trait(traits[0]): |
|
1426 | if len(traits) == 1 and default_value is None and not is_trait(traits[0]): | |
1438 | default_value = traits[0] |
|
1427 | default_value = traits[0] | |
1439 | traits = () |
|
1428 | traits = () | |
1440 |
|
1429 | |||
1441 | if default_value is None: |
|
1430 | if default_value is None: | |
1442 | args = () |
|
1431 | args = () | |
1443 | elif isinstance(default_value, self._valid_defaults): |
|
1432 | elif isinstance(default_value, self._valid_defaults): | |
1444 | args = (default_value,) |
|
1433 | args = (default_value,) | |
1445 | else: |
|
1434 | else: | |
1446 | raise TypeError('default value of %s was %s' %(self.__class__.__name__, default_value)) |
|
1435 | raise TypeError('default value of %s was %s' %(self.__class__.__name__, default_value)) | |
1447 |
|
1436 | |||
1448 | self._traits = [] |
|
1437 | self._traits = [] | |
1449 | for trait in traits: |
|
1438 | for trait in traits: | |
1450 | t = trait() if isinstance(trait, type) else trait |
|
1439 | t = trait() if isinstance(trait, type) else trait | |
1451 | t.name = 'element' |
|
1440 | t.name = 'element' | |
1452 | self._traits.append(t) |
|
1441 | self._traits.append(t) | |
1453 |
|
1442 | |||
1454 | if self._traits and default_value is None: |
|
1443 | if self._traits and default_value is None: | |
1455 | # don't allow default to be an empty container if length is specified |
|
1444 | # don't allow default to be an empty container if length is specified | |
1456 | args = None |
|
1445 | args = None | |
1457 | super(Container,self).__init__(klass=self.klass, args=args, |
|
1446 | super(Container,self).__init__(klass=self.klass, args=args, | |
1458 | allow_none=allow_none, **metadata) |
|
1447 | allow_none=allow_none, **metadata) | |
1459 |
|
1448 | |||
1460 | def validate_elements(self, obj, value): |
|
1449 | def validate_elements(self, obj, value): | |
1461 | if not self._traits: |
|
1450 | if not self._traits: | |
1462 | # nothing to validate |
|
1451 | # nothing to validate | |
1463 | return value |
|
1452 | return value | |
1464 | if len(value) != len(self._traits): |
|
1453 | if len(value) != len(self._traits): | |
1465 | e = "The '%s' trait of %s instance requires %i elements, but a value of %s was specified." \ |
|
1454 | e = "The '%s' trait of %s instance requires %i elements, but a value of %s was specified." \ | |
1466 | % (self.name, class_of(obj), len(self._traits), repr_type(value)) |
|
1455 | % (self.name, class_of(obj), len(self._traits), repr_type(value)) | |
1467 | raise TraitError(e) |
|
1456 | raise TraitError(e) | |
1468 |
|
1457 | |||
1469 | validated = [] |
|
1458 | validated = [] | |
1470 | for t,v in zip(self._traits, value): |
|
1459 | for t,v in zip(self._traits, value): | |
1471 | try: |
|
1460 | try: | |
1472 | v = t.validate(obj, v) |
|
1461 | v = t.validate(obj, v) | |
1473 | except TraitError: |
|
1462 | except TraitError: | |
1474 | self.element_error(obj, v, t) |
|
1463 | self.element_error(obj, v, t) | |
1475 | else: |
|
1464 | else: | |
1476 | validated.append(v) |
|
1465 | validated.append(v) | |
1477 | return tuple(validated) |
|
1466 | return tuple(validated) | |
1478 |
|
1467 | |||
1479 |
|
1468 | |||
1480 | class Dict(Instance): |
|
1469 | class Dict(Instance): | |
1481 | """An instance of a Python dict.""" |
|
1470 | """An instance of a Python dict.""" | |
1482 |
|
1471 | |||
1483 | def __init__(self, default_value=None, allow_none=True, **metadata): |
|
1472 | def __init__(self, default_value=None, allow_none=True, **metadata): | |
1484 | """Create a dict trait type from a dict. |
|
1473 | """Create a dict trait type from a dict. | |
1485 |
|
1474 | |||
1486 | The default value is created by doing ``dict(default_value)``, |
|
1475 | The default value is created by doing ``dict(default_value)``, | |
1487 | which creates a copy of the ``default_value``. |
|
1476 | which creates a copy of the ``default_value``. | |
1488 | """ |
|
1477 | """ | |
1489 | if default_value is None: |
|
1478 | if default_value is None: | |
1490 | args = ((),) |
|
1479 | args = ((),) | |
1491 | elif isinstance(default_value, dict): |
|
1480 | elif isinstance(default_value, dict): | |
1492 | args = (default_value,) |
|
1481 | args = (default_value,) | |
1493 | elif isinstance(default_value, SequenceTypes): |
|
1482 | elif isinstance(default_value, SequenceTypes): | |
1494 | args = (default_value,) |
|
1483 | args = (default_value,) | |
1495 | else: |
|
1484 | else: | |
1496 | raise TypeError('default value of Dict was %s' % default_value) |
|
1485 | raise TypeError('default value of Dict was %s' % default_value) | |
1497 |
|
1486 | |||
1498 | super(Dict,self).__init__(klass=dict, args=args, |
|
1487 | super(Dict,self).__init__(klass=dict, args=args, | |
1499 | allow_none=allow_none, **metadata) |
|
1488 | allow_none=allow_none, **metadata) | |
1500 |
|
1489 | |||
1501 | class TCPAddress(TraitType): |
|
1490 | class TCPAddress(TraitType): | |
1502 | """A trait for an (ip, port) tuple. |
|
1491 | """A trait for an (ip, port) tuple. | |
1503 |
|
1492 | |||
1504 | This allows for both IPv4 IP addresses as well as hostnames. |
|
1493 | This allows for both IPv4 IP addresses as well as hostnames. | |
1505 | """ |
|
1494 | """ | |
1506 |
|
1495 | |||
1507 | default_value = ('127.0.0.1', 0) |
|
1496 | default_value = ('127.0.0.1', 0) | |
1508 | info_text = 'an (ip, port) tuple' |
|
1497 | info_text = 'an (ip, port) tuple' | |
1509 |
|
1498 | |||
1510 | def validate(self, obj, value): |
|
1499 | def validate(self, obj, value): | |
1511 | if isinstance(value, tuple): |
|
1500 | if isinstance(value, tuple): | |
1512 | if len(value) == 2: |
|
1501 | if len(value) == 2: | |
1513 | if isinstance(value[0], py3compat.string_types) and isinstance(value[1], int): |
|
1502 | if isinstance(value[0], py3compat.string_types) and isinstance(value[1], int): | |
1514 | port = value[1] |
|
1503 | port = value[1] | |
1515 | if port >= 0 and port <= 65535: |
|
1504 | if port >= 0 and port <= 65535: | |
1516 | return value |
|
1505 | return value | |
1517 | self.error(obj, value) |
|
1506 | self.error(obj, value) | |
1518 |
|
1507 | |||
1519 | class CRegExp(TraitType): |
|
1508 | class CRegExp(TraitType): | |
1520 | """A casting compiled regular expression trait. |
|
1509 | """A casting compiled regular expression trait. | |
1521 |
|
1510 | |||
1522 | Accepts both strings and compiled regular expressions. The resulting |
|
1511 | Accepts both strings and compiled regular expressions. The resulting | |
1523 | attribute will be a compiled regular expression.""" |
|
1512 | attribute will be a compiled regular expression.""" | |
1524 |
|
1513 | |||
1525 | info_text = 'a regular expression' |
|
1514 | info_text = 'a regular expression' | |
1526 |
|
1515 | |||
1527 | def validate(self, obj, value): |
|
1516 | def validate(self, obj, value): | |
1528 | try: |
|
1517 | try: | |
1529 | return re.compile(value) |
|
1518 | return re.compile(value) | |
1530 | except: |
|
1519 | except: | |
1531 | self.error(obj, value) |
|
1520 | self.error(obj, value) |
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