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1 | """IPython extension to reload modules before executing user code. |
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1 | """IPython extension to reload modules before executing user code. | |
2 |
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2 | |||
3 | ``autoreload`` reloads modules automatically before entering the execution of |
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3 | ``autoreload`` reloads modules automatically before entering the execution of | |
4 | code typed at the IPython prompt. |
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4 | code typed at the IPython prompt. | |
5 |
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5 | |||
6 | This makes for example the following workflow possible: |
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6 | This makes for example the following workflow possible: | |
7 |
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7 | |||
8 | .. sourcecode:: ipython |
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8 | .. sourcecode:: ipython | |
9 |
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9 | |||
10 | In [1]: %load_ext autoreload |
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10 | In [1]: %load_ext autoreload | |
11 |
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11 | |||
12 | In [2]: %autoreload 2 |
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12 | In [2]: %autoreload 2 | |
13 |
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13 | |||
14 | In [3]: from foo import some_function |
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14 | In [3]: from foo import some_function | |
15 |
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15 | |||
16 | In [4]: some_function() |
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16 | In [4]: some_function() | |
17 | Out[4]: 42 |
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17 | Out[4]: 42 | |
18 |
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18 | |||
19 | In [5]: # open foo.py in an editor and change some_function to return 43 |
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19 | In [5]: # open foo.py in an editor and change some_function to return 43 | |
20 |
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20 | |||
21 | In [6]: some_function() |
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21 | In [6]: some_function() | |
22 | Out[6]: 43 |
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22 | Out[6]: 43 | |
23 |
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23 | |||
24 | The module was reloaded without reloading it explicitly, and the object |
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24 | The module was reloaded without reloading it explicitly, and the object | |
25 | imported with ``from foo import ...`` was also updated. |
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25 | imported with ``from foo import ...`` was also updated. | |
26 |
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26 | |||
27 | Usage |
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27 | Usage | |
28 | ===== |
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28 | ===== | |
29 |
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29 | |||
30 | The following magic commands are provided: |
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30 | The following magic commands are provided: | |
31 |
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31 | |||
32 | ``%autoreload`` |
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32 | ``%autoreload`` | |
33 |
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33 | |||
34 | Reload all modules (except those excluded by ``%aimport``) |
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34 | Reload all modules (except those excluded by ``%aimport``) | |
35 | automatically now. |
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35 | automatically now. | |
36 |
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36 | |||
37 | ``%autoreload 0`` |
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37 | ``%autoreload 0`` | |
38 |
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38 | |||
39 | Disable automatic reloading. |
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39 | Disable automatic reloading. | |
40 |
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40 | |||
41 | ``%autoreload 1`` |
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41 | ``%autoreload 1`` | |
42 |
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42 | |||
43 | Reload all modules imported with ``%aimport`` every time before |
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43 | Reload all modules imported with ``%aimport`` every time before | |
44 | executing the Python code typed. |
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44 | executing the Python code typed. | |
45 |
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45 | |||
46 | ``%autoreload 2`` |
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46 | ``%autoreload 2`` | |
47 |
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47 | |||
48 | Reload all modules (except those excluded by ``%aimport``) every |
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48 | Reload all modules (except those excluded by ``%aimport``) every | |
49 | time before executing the Python code typed. |
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49 | time before executing the Python code typed. | |
50 |
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50 | |||
51 | ``%aimport`` |
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51 | ``%aimport`` | |
52 |
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52 | |||
53 | List modules which are to be automatically imported or not to be imported. |
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53 | List modules which are to be automatically imported or not to be imported. | |
54 |
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54 | |||
55 | ``%aimport foo`` |
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55 | ``%aimport foo`` | |
56 |
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56 | |||
57 | Import module 'foo' and mark it to be autoreloaded for ``%autoreload 1`` |
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57 | Import module 'foo' and mark it to be autoreloaded for ``%autoreload 1`` | |
58 |
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58 | |||
59 | ``%aimport -foo`` |
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59 | ``%aimport -foo`` | |
60 |
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60 | |||
61 | Mark module 'foo' to not be autoreloaded. |
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61 | Mark module 'foo' to not be autoreloaded. | |
62 |
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62 | |||
63 | Caveats |
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63 | Caveats | |
64 | ======= |
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64 | ======= | |
65 |
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65 | |||
66 | Reloading Python modules in a reliable way is in general difficult, |
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66 | Reloading Python modules in a reliable way is in general difficult, | |
67 | and unexpected things may occur. ``%autoreload`` tries to work around |
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67 | and unexpected things may occur. ``%autoreload`` tries to work around | |
68 | common pitfalls by replacing function code objects and parts of |
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68 | common pitfalls by replacing function code objects and parts of | |
69 | classes previously in the module with new versions. This makes the |
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69 | classes previously in the module with new versions. This makes the | |
70 | following things to work: |
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70 | following things to work: | |
71 |
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71 | |||
72 | - Functions and classes imported via 'from xxx import foo' are upgraded |
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72 | - Functions and classes imported via 'from xxx import foo' are upgraded | |
73 | to new versions when 'xxx' is reloaded. |
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73 | to new versions when 'xxx' is reloaded. | |
74 |
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74 | |||
75 | - Methods and properties of classes are upgraded on reload, so that |
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75 | - Methods and properties of classes are upgraded on reload, so that | |
76 | calling 'c.foo()' on an object 'c' created before the reload causes |
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76 | calling 'c.foo()' on an object 'c' created before the reload causes | |
77 | the new code for 'foo' to be executed. |
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77 | the new code for 'foo' to be executed. | |
78 |
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78 | |||
79 | Some of the known remaining caveats are: |
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79 | Some of the known remaining caveats are: | |
80 |
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80 | |||
81 | - Replacing code objects does not always succeed: changing a @property |
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81 | - Replacing code objects does not always succeed: changing a @property | |
82 | in a class to an ordinary method or a method to a member variable |
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82 | in a class to an ordinary method or a method to a member variable | |
83 | can cause problems (but in old objects only). |
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83 | can cause problems (but in old objects only). | |
84 |
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84 | |||
85 | - Functions that are removed (eg. via monkey-patching) from a module |
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85 | - Functions that are removed (eg. via monkey-patching) from a module | |
86 | before it is reloaded are not upgraded. |
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86 | before it is reloaded are not upgraded. | |
87 |
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87 | |||
88 | - C extension modules cannot be reloaded, and so cannot be autoreloaded. |
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88 | - C extension modules cannot be reloaded, and so cannot be autoreloaded. | |
89 | """ |
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89 | """ | |
90 | from __future__ import print_function |
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90 | from __future__ import print_function | |
91 |
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91 | |||
92 | skip_doctest = True |
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92 | skip_doctest = True | |
93 |
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93 | |||
94 | #----------------------------------------------------------------------------- |
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94 | #----------------------------------------------------------------------------- | |
95 | # Copyright (C) 2000 Thomas Heller |
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95 | # Copyright (C) 2000 Thomas Heller | |
96 | # Copyright (C) 2008 Pauli Virtanen <pav@iki.fi> |
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96 | # Copyright (C) 2008 Pauli Virtanen <pav@iki.fi> | |
97 | # Copyright (C) 2012 The IPython Development Team |
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97 | # Copyright (C) 2012 The IPython Development Team | |
98 | # |
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98 | # | |
99 | # Distributed under the terms of the BSD License. The full license is in |
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99 | # Distributed under the terms of the BSD License. The full license is in | |
100 | # the file COPYING, distributed as part of this software. |
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100 | # the file COPYING, distributed as part of this software. | |
101 | #----------------------------------------------------------------------------- |
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101 | #----------------------------------------------------------------------------- | |
102 | # |
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102 | # | |
103 | # This IPython module is written by Pauli Virtanen, based on the autoreload |
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103 | # This IPython module is written by Pauli Virtanen, based on the autoreload | |
104 | # code by Thomas Heller. |
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104 | # code by Thomas Heller. | |
105 |
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105 | |||
106 | #----------------------------------------------------------------------------- |
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106 | #----------------------------------------------------------------------------- | |
107 | # Imports |
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107 | # Imports | |
108 | #----------------------------------------------------------------------------- |
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108 | #----------------------------------------------------------------------------- | |
109 |
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109 | |||
110 | import os |
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110 | import os | |
111 | import sys |
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111 | import sys | |
112 | import traceback |
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112 | import traceback | |
113 | import types |
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113 | import types | |
114 | import weakref |
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114 | import weakref | |
115 |
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115 | |||
116 | try: |
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116 | try: | |
117 | # Reload is not defined by default in Python3. |
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117 | # Reload is not defined by default in Python3. | |
118 | reload |
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118 | reload | |
119 | except NameError: |
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119 | except NameError: | |
120 | from imp import reload |
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120 | from imp import reload | |
121 |
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121 | |||
122 | from IPython.utils import openpy |
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122 | from IPython.utils import openpy | |
123 | from IPython.utils.py3compat import PY3 |
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123 | from IPython.utils.py3compat import PY3 | |
124 |
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124 | |||
125 | #------------------------------------------------------------------------------ |
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125 | #------------------------------------------------------------------------------ | |
126 | # Autoreload functionality |
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126 | # Autoreload functionality | |
127 | #------------------------------------------------------------------------------ |
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127 | #------------------------------------------------------------------------------ | |
128 |
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128 | |||
129 | class ModuleReloader(object): |
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129 | class ModuleReloader(object): | |
130 | enabled = False |
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130 | enabled = False | |
131 | """Whether this reloader is enabled""" |
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131 | """Whether this reloader is enabled""" | |
132 |
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132 | |||
133 | failed = {} |
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133 | failed = {} | |
134 | """Modules that failed to reload: {module: mtime-on-failed-reload, ...}""" |
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134 | """Modules that failed to reload: {module: mtime-on-failed-reload, ...}""" | |
135 |
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135 | |||
136 | modules = {} |
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136 | modules = {} | |
137 | """Modules specially marked as autoreloadable.""" |
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137 | """Modules specially marked as autoreloadable.""" | |
138 |
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138 | |||
139 | skip_modules = {} |
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139 | skip_modules = {} | |
140 | """Modules specially marked as not autoreloadable.""" |
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140 | """Modules specially marked as not autoreloadable.""" | |
141 |
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141 | |||
142 | check_all = True |
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142 | check_all = True | |
143 | """Autoreload all modules, not just those listed in 'modules'""" |
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143 | """Autoreload all modules, not just those listed in 'modules'""" | |
144 |
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144 | |||
145 | old_objects = {} |
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145 | old_objects = {} | |
146 | """(module-name, name) -> weakref, for replacing old code objects""" |
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146 | """(module-name, name) -> weakref, for replacing old code objects""" | |
147 |
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147 | |||
148 | def mark_module_skipped(self, module_name): |
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148 | def mark_module_skipped(self, module_name): | |
149 | """Skip reloading the named module in the future""" |
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149 | """Skip reloading the named module in the future""" | |
150 | try: |
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150 | try: | |
151 | del self.modules[module_name] |
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151 | del self.modules[module_name] | |
152 | except KeyError: |
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152 | except KeyError: | |
153 | pass |
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153 | pass | |
154 | self.skip_modules[module_name] = True |
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154 | self.skip_modules[module_name] = True | |
155 |
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155 | |||
156 | def mark_module_reloadable(self, module_name): |
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156 | def mark_module_reloadable(self, module_name): | |
157 | """Reload the named module in the future (if it is imported)""" |
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157 | """Reload the named module in the future (if it is imported)""" | |
158 | try: |
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158 | try: | |
159 | del self.skip_modules[module_name] |
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159 | del self.skip_modules[module_name] | |
160 | except KeyError: |
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160 | except KeyError: | |
161 | pass |
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161 | pass | |
162 | self.modules[module_name] = True |
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162 | self.modules[module_name] = True | |
163 |
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163 | |||
164 | def aimport_module(self, module_name): |
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164 | def aimport_module(self, module_name): | |
165 | """Import a module, and mark it reloadable |
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165 | """Import a module, and mark it reloadable | |
166 |
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166 | |||
167 | Returns |
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167 | Returns | |
168 | ------- |
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168 | ------- | |
169 | top_module : module |
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169 | top_module : module | |
170 | The imported module if it is top-level, or the top-level |
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170 | The imported module if it is top-level, or the top-level | |
171 | top_name : module |
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171 | top_name : module | |
172 | Name of top_module |
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172 | Name of top_module | |
173 |
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173 | |||
174 | """ |
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174 | """ | |
175 | self.mark_module_reloadable(module_name) |
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175 | self.mark_module_reloadable(module_name) | |
176 |
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176 | |||
177 | __import__(module_name) |
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177 | __import__(module_name) | |
178 | top_name = module_name.split('.')[0] |
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178 | top_name = module_name.split('.')[0] | |
179 | top_module = sys.modules[top_name] |
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179 | top_module = sys.modules[top_name] | |
180 | return top_module, top_name |
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180 | return top_module, top_name | |
181 |
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181 | |||
182 | def check(self, check_all=False): |
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182 | def check(self, check_all=False): | |
183 | """Check whether some modules need to be reloaded.""" |
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183 | """Check whether some modules need to be reloaded.""" | |
184 |
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184 | |||
185 | if not self.enabled and not check_all: |
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185 | if not self.enabled and not check_all: | |
186 | return |
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186 | return | |
187 |
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187 | |||
188 | if check_all or self.check_all: |
|
188 | if check_all or self.check_all: | |
189 | modules = sys.modules.keys() |
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189 | modules = list(sys.modules.keys()) | |
190 | else: |
|
190 | else: | |
191 | modules = self.modules.keys() |
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191 | modules = list(self.modules.keys()) | |
192 |
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192 | |||
193 | for modname in modules: |
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193 | for modname in modules: | |
194 | m = sys.modules.get(modname, None) |
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194 | m = sys.modules.get(modname, None) | |
195 |
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195 | |||
196 | if modname in self.skip_modules: |
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196 | if modname in self.skip_modules: | |
197 | continue |
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197 | continue | |
198 |
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198 | |||
199 | if not hasattr(m, '__file__'): |
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199 | if not hasattr(m, '__file__'): | |
200 | continue |
|
200 | continue | |
201 |
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201 | |||
202 | if m.__name__ == '__main__': |
|
202 | if m.__name__ == '__main__': | |
203 | # we cannot reload(__main__) |
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203 | # we cannot reload(__main__) | |
204 | continue |
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204 | continue | |
205 |
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205 | |||
206 | filename = m.__file__ |
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206 | filename = m.__file__ | |
207 | path, ext = os.path.splitext(filename) |
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207 | path, ext = os.path.splitext(filename) | |
208 |
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208 | |||
209 | if ext.lower() == '.py': |
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209 | if ext.lower() == '.py': | |
210 | pyc_filename = openpy.cache_from_source(filename) |
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210 | pyc_filename = openpy.cache_from_source(filename) | |
211 | py_filename = filename |
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211 | py_filename = filename | |
212 | else: |
|
212 | else: | |
213 | pyc_filename = filename |
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213 | pyc_filename = filename | |
214 | try: |
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214 | try: | |
215 | py_filename = openpy.source_from_cache(filename) |
|
215 | py_filename = openpy.source_from_cache(filename) | |
216 | except ValueError: |
|
216 | except ValueError: | |
217 | continue |
|
217 | continue | |
218 |
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218 | |||
219 | try: |
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219 | try: | |
220 | pymtime = os.stat(py_filename).st_mtime |
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220 | pymtime = os.stat(py_filename).st_mtime | |
221 | if pymtime <= os.stat(pyc_filename).st_mtime: |
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221 | if pymtime <= os.stat(pyc_filename).st_mtime: | |
222 | continue |
|
222 | continue | |
223 | if self.failed.get(py_filename, None) == pymtime: |
|
223 | if self.failed.get(py_filename, None) == pymtime: | |
224 | continue |
|
224 | continue | |
225 | except OSError: |
|
225 | except OSError: | |
226 | continue |
|
226 | continue | |
227 |
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227 | |||
228 | try: |
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228 | try: | |
229 | superreload(m, reload, self.old_objects) |
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229 | superreload(m, reload, self.old_objects) | |
230 | if py_filename in self.failed: |
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230 | if py_filename in self.failed: | |
231 | del self.failed[py_filename] |
|
231 | del self.failed[py_filename] | |
232 | except: |
|
232 | except: | |
233 | print("[autoreload of %s failed: %s]" % ( |
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233 | print("[autoreload of %s failed: %s]" % ( | |
234 | modname, traceback.format_exc(1)), file=sys.stderr) |
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234 | modname, traceback.format_exc(1)), file=sys.stderr) | |
235 | self.failed[py_filename] = pymtime |
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235 | self.failed[py_filename] = pymtime | |
236 |
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236 | |||
237 | #------------------------------------------------------------------------------ |
|
237 | #------------------------------------------------------------------------------ | |
238 | # superreload |
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238 | # superreload | |
239 | #------------------------------------------------------------------------------ |
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239 | #------------------------------------------------------------------------------ | |
240 |
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240 | |||
241 | if PY3: |
|
241 | if PY3: | |
242 | func_attrs = ['__code__', '__defaults__', '__doc__', |
|
242 | func_attrs = ['__code__', '__defaults__', '__doc__', | |
243 | '__closure__', '__globals__', '__dict__'] |
|
243 | '__closure__', '__globals__', '__dict__'] | |
244 | else: |
|
244 | else: | |
245 | func_attrs = ['func_code', 'func_defaults', 'func_doc', |
|
245 | func_attrs = ['func_code', 'func_defaults', 'func_doc', | |
246 | 'func_closure', 'func_globals', 'func_dict'] |
|
246 | 'func_closure', 'func_globals', 'func_dict'] | |
247 |
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247 | |||
248 |
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248 | |||
249 | def update_function(old, new): |
|
249 | def update_function(old, new): | |
250 | """Upgrade the code object of a function""" |
|
250 | """Upgrade the code object of a function""" | |
251 | for name in func_attrs: |
|
251 | for name in func_attrs: | |
252 | try: |
|
252 | try: | |
253 | setattr(old, name, getattr(new, name)) |
|
253 | setattr(old, name, getattr(new, name)) | |
254 | except (AttributeError, TypeError): |
|
254 | except (AttributeError, TypeError): | |
255 | pass |
|
255 | pass | |
256 |
|
256 | |||
257 |
|
257 | |||
258 | def update_class(old, new): |
|
258 | def update_class(old, new): | |
259 | """Replace stuff in the __dict__ of a class, and upgrade |
|
259 | """Replace stuff in the __dict__ of a class, and upgrade | |
260 | method code objects""" |
|
260 | method code objects""" | |
261 | for key in old.__dict__.keys(): |
|
261 | for key in list(old.__dict__.keys()): | |
262 | old_obj = getattr(old, key) |
|
262 | old_obj = getattr(old, key) | |
263 |
|
263 | |||
264 | try: |
|
264 | try: | |
265 | new_obj = getattr(new, key) |
|
265 | new_obj = getattr(new, key) | |
266 | except AttributeError: |
|
266 | except AttributeError: | |
267 | # obsolete attribute: remove it |
|
267 | # obsolete attribute: remove it | |
268 | try: |
|
268 | try: | |
269 | delattr(old, key) |
|
269 | delattr(old, key) | |
270 | except (AttributeError, TypeError): |
|
270 | except (AttributeError, TypeError): | |
271 | pass |
|
271 | pass | |
272 | continue |
|
272 | continue | |
273 |
|
273 | |||
274 | if update_generic(old_obj, new_obj): continue |
|
274 | if update_generic(old_obj, new_obj): continue | |
275 |
|
275 | |||
276 | try: |
|
276 | try: | |
277 | setattr(old, key, getattr(new, key)) |
|
277 | setattr(old, key, getattr(new, key)) | |
278 | except (AttributeError, TypeError): |
|
278 | except (AttributeError, TypeError): | |
279 | pass # skip non-writable attributes |
|
279 | pass # skip non-writable attributes | |
280 |
|
280 | |||
281 |
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281 | |||
282 | def update_property(old, new): |
|
282 | def update_property(old, new): | |
283 | """Replace get/set/del functions of a property""" |
|
283 | """Replace get/set/del functions of a property""" | |
284 | update_generic(old.fdel, new.fdel) |
|
284 | update_generic(old.fdel, new.fdel) | |
285 | update_generic(old.fget, new.fget) |
|
285 | update_generic(old.fget, new.fget) | |
286 | update_generic(old.fset, new.fset) |
|
286 | update_generic(old.fset, new.fset) | |
287 |
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287 | |||
288 |
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288 | |||
289 | def isinstance2(a, b, typ): |
|
289 | def isinstance2(a, b, typ): | |
290 | return isinstance(a, typ) and isinstance(b, typ) |
|
290 | return isinstance(a, typ) and isinstance(b, typ) | |
291 |
|
291 | |||
292 |
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292 | |||
293 | UPDATE_RULES = [ |
|
293 | UPDATE_RULES = [ | |
294 | (lambda a, b: isinstance2(a, b, type), |
|
294 | (lambda a, b: isinstance2(a, b, type), | |
295 | update_class), |
|
295 | update_class), | |
296 | (lambda a, b: isinstance2(a, b, types.FunctionType), |
|
296 | (lambda a, b: isinstance2(a, b, types.FunctionType), | |
297 | update_function), |
|
297 | update_function), | |
298 | (lambda a, b: isinstance2(a, b, property), |
|
298 | (lambda a, b: isinstance2(a, b, property), | |
299 | update_property), |
|
299 | update_property), | |
300 | ] |
|
300 | ] | |
301 |
|
301 | |||
302 |
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302 | |||
303 | if PY3: |
|
303 | if PY3: | |
304 | UPDATE_RULES.extend([(lambda a, b: isinstance2(a, b, types.MethodType), |
|
304 | UPDATE_RULES.extend([(lambda a, b: isinstance2(a, b, types.MethodType), | |
305 | lambda a, b: update_function(a.__func__, b.__func__)), |
|
305 | lambda a, b: update_function(a.__func__, b.__func__)), | |
306 | ]) |
|
306 | ]) | |
307 | else: |
|
307 | else: | |
308 | UPDATE_RULES.extend([(lambda a, b: isinstance2(a, b, types.ClassType), |
|
308 | UPDATE_RULES.extend([(lambda a, b: isinstance2(a, b, types.ClassType), | |
309 | update_class), |
|
309 | update_class), | |
310 | (lambda a, b: isinstance2(a, b, types.MethodType), |
|
310 | (lambda a, b: isinstance2(a, b, types.MethodType), | |
311 | lambda a, b: update_function(a.__func__, b.__func__)), |
|
311 | lambda a, b: update_function(a.__func__, b.__func__)), | |
312 | ]) |
|
312 | ]) | |
313 |
|
313 | |||
314 |
|
314 | |||
315 | def update_generic(a, b): |
|
315 | def update_generic(a, b): | |
316 | for type_check, update in UPDATE_RULES: |
|
316 | for type_check, update in UPDATE_RULES: | |
317 | if type_check(a, b): |
|
317 | if type_check(a, b): | |
318 | update(a, b) |
|
318 | update(a, b) | |
319 | return True |
|
319 | return True | |
320 | return False |
|
320 | return False | |
321 |
|
321 | |||
322 |
|
322 | |||
323 | class StrongRef(object): |
|
323 | class StrongRef(object): | |
324 | def __init__(self, obj): |
|
324 | def __init__(self, obj): | |
325 | self.obj = obj |
|
325 | self.obj = obj | |
326 | def __call__(self): |
|
326 | def __call__(self): | |
327 | return self.obj |
|
327 | return self.obj | |
328 |
|
328 | |||
329 |
|
329 | |||
330 | def superreload(module, reload=reload, old_objects={}): |
|
330 | def superreload(module, reload=reload, old_objects={}): | |
331 | """Enhanced version of the builtin reload function. |
|
331 | """Enhanced version of the builtin reload function. | |
332 |
|
332 | |||
333 | superreload remembers objects previously in the module, and |
|
333 | superreload remembers objects previously in the module, and | |
334 |
|
334 | |||
335 | - upgrades the class dictionary of every old class in the module |
|
335 | - upgrades the class dictionary of every old class in the module | |
336 | - upgrades the code object of every old function and method |
|
336 | - upgrades the code object of every old function and method | |
337 | - clears the module's namespace before reloading |
|
337 | - clears the module's namespace before reloading | |
338 |
|
338 | |||
339 | """ |
|
339 | """ | |
340 |
|
340 | |||
341 | # collect old objects in the module |
|
341 | # collect old objects in the module | |
342 | for name, obj in module.__dict__.items(): |
|
342 | for name, obj in list(module.__dict__.items()): | |
343 | if not hasattr(obj, '__module__') or obj.__module__ != module.__name__: |
|
343 | if not hasattr(obj, '__module__') or obj.__module__ != module.__name__: | |
344 | continue |
|
344 | continue | |
345 | key = (module.__name__, name) |
|
345 | key = (module.__name__, name) | |
346 | try: |
|
346 | try: | |
347 | old_objects.setdefault(key, []).append(weakref.ref(obj)) |
|
347 | old_objects.setdefault(key, []).append(weakref.ref(obj)) | |
348 | except TypeError: |
|
348 | except TypeError: | |
349 | # weakref doesn't work for all types; |
|
349 | # weakref doesn't work for all types; | |
350 | # create strong references for 'important' cases |
|
350 | # create strong references for 'important' cases | |
351 | if not PY3 and isinstance(obj, types.ClassType): |
|
351 | if not PY3 and isinstance(obj, types.ClassType): | |
352 | old_objects.setdefault(key, []).append(StrongRef(obj)) |
|
352 | old_objects.setdefault(key, []).append(StrongRef(obj)) | |
353 |
|
353 | |||
354 | # reload module |
|
354 | # reload module | |
355 | try: |
|
355 | try: | |
356 | # clear namespace first from old cruft |
|
356 | # clear namespace first from old cruft | |
357 | old_dict = module.__dict__.copy() |
|
357 | old_dict = module.__dict__.copy() | |
358 | old_name = module.__name__ |
|
358 | old_name = module.__name__ | |
359 | module.__dict__.clear() |
|
359 | module.__dict__.clear() | |
360 | module.__dict__['__name__'] = old_name |
|
360 | module.__dict__['__name__'] = old_name | |
361 | module.__dict__['__loader__'] = old_dict['__loader__'] |
|
361 | module.__dict__['__loader__'] = old_dict['__loader__'] | |
362 | except (TypeError, AttributeError, KeyError): |
|
362 | except (TypeError, AttributeError, KeyError): | |
363 | pass |
|
363 | pass | |
364 |
|
364 | |||
365 | try: |
|
365 | try: | |
366 | module = reload(module) |
|
366 | module = reload(module) | |
367 | except: |
|
367 | except: | |
368 | # restore module dictionary on failed reload |
|
368 | # restore module dictionary on failed reload | |
369 | module.__dict__.update(old_dict) |
|
369 | module.__dict__.update(old_dict) | |
370 | raise |
|
370 | raise | |
371 |
|
371 | |||
372 | # iterate over all objects and update functions & classes |
|
372 | # iterate over all objects and update functions & classes | |
373 | for name, new_obj in module.__dict__.items(): |
|
373 | for name, new_obj in list(module.__dict__.items()): | |
374 | key = (module.__name__, name) |
|
374 | key = (module.__name__, name) | |
375 | if key not in old_objects: continue |
|
375 | if key not in old_objects: continue | |
376 |
|
376 | |||
377 | new_refs = [] |
|
377 | new_refs = [] | |
378 | for old_ref in old_objects[key]: |
|
378 | for old_ref in old_objects[key]: | |
379 | old_obj = old_ref() |
|
379 | old_obj = old_ref() | |
380 | if old_obj is None: continue |
|
380 | if old_obj is None: continue | |
381 | new_refs.append(old_ref) |
|
381 | new_refs.append(old_ref) | |
382 | update_generic(old_obj, new_obj) |
|
382 | update_generic(old_obj, new_obj) | |
383 |
|
383 | |||
384 | if new_refs: |
|
384 | if new_refs: | |
385 | old_objects[key] = new_refs |
|
385 | old_objects[key] = new_refs | |
386 | else: |
|
386 | else: | |
387 | del old_objects[key] |
|
387 | del old_objects[key] | |
388 |
|
388 | |||
389 | return module |
|
389 | return module | |
390 |
|
390 | |||
391 | #------------------------------------------------------------------------------ |
|
391 | #------------------------------------------------------------------------------ | |
392 | # IPython connectivity |
|
392 | # IPython connectivity | |
393 | #------------------------------------------------------------------------------ |
|
393 | #------------------------------------------------------------------------------ | |
394 |
|
394 | |||
395 | from IPython.core.hooks import TryNext |
|
395 | from IPython.core.hooks import TryNext | |
396 | from IPython.core.magic import Magics, magics_class, line_magic |
|
396 | from IPython.core.magic import Magics, magics_class, line_magic | |
397 |
|
397 | |||
398 | @magics_class |
|
398 | @magics_class | |
399 | class AutoreloadMagics(Magics): |
|
399 | class AutoreloadMagics(Magics): | |
400 | def __init__(self, *a, **kw): |
|
400 | def __init__(self, *a, **kw): | |
401 | super(AutoreloadMagics, self).__init__(*a, **kw) |
|
401 | super(AutoreloadMagics, self).__init__(*a, **kw) | |
402 | self._reloader = ModuleReloader() |
|
402 | self._reloader = ModuleReloader() | |
403 | self._reloader.check_all = False |
|
403 | self._reloader.check_all = False | |
404 |
|
404 | |||
405 | @line_magic |
|
405 | @line_magic | |
406 | def autoreload(self, parameter_s=''): |
|
406 | def autoreload(self, parameter_s=''): | |
407 | r"""%autoreload => Reload modules automatically |
|
407 | r"""%autoreload => Reload modules automatically | |
408 |
|
408 | |||
409 | %autoreload |
|
409 | %autoreload | |
410 | Reload all modules (except those excluded by %aimport) automatically |
|
410 | Reload all modules (except those excluded by %aimport) automatically | |
411 | now. |
|
411 | now. | |
412 |
|
412 | |||
413 | %autoreload 0 |
|
413 | %autoreload 0 | |
414 | Disable automatic reloading. |
|
414 | Disable automatic reloading. | |
415 |
|
415 | |||
416 | %autoreload 1 |
|
416 | %autoreload 1 | |
417 | Reload all modules imported with %aimport every time before executing |
|
417 | Reload all modules imported with %aimport every time before executing | |
418 | the Python code typed. |
|
418 | the Python code typed. | |
419 |
|
419 | |||
420 | %autoreload 2 |
|
420 | %autoreload 2 | |
421 | Reload all modules (except those excluded by %aimport) every time |
|
421 | Reload all modules (except those excluded by %aimport) every time | |
422 | before executing the Python code typed. |
|
422 | before executing the Python code typed. | |
423 |
|
423 | |||
424 | Reloading Python modules in a reliable way is in general |
|
424 | Reloading Python modules in a reliable way is in general | |
425 | difficult, and unexpected things may occur. %autoreload tries to |
|
425 | difficult, and unexpected things may occur. %autoreload tries to | |
426 | work around common pitfalls by replacing function code objects and |
|
426 | work around common pitfalls by replacing function code objects and | |
427 | parts of classes previously in the module with new versions. This |
|
427 | parts of classes previously in the module with new versions. This | |
428 | makes the following things to work: |
|
428 | makes the following things to work: | |
429 |
|
429 | |||
430 | - Functions and classes imported via 'from xxx import foo' are upgraded |
|
430 | - Functions and classes imported via 'from xxx import foo' are upgraded | |
431 | to new versions when 'xxx' is reloaded. |
|
431 | to new versions when 'xxx' is reloaded. | |
432 |
|
432 | |||
433 | - Methods and properties of classes are upgraded on reload, so that |
|
433 | - Methods and properties of classes are upgraded on reload, so that | |
434 | calling 'c.foo()' on an object 'c' created before the reload causes |
|
434 | calling 'c.foo()' on an object 'c' created before the reload causes | |
435 | the new code for 'foo' to be executed. |
|
435 | the new code for 'foo' to be executed. | |
436 |
|
436 | |||
437 | Some of the known remaining caveats are: |
|
437 | Some of the known remaining caveats are: | |
438 |
|
438 | |||
439 | - Replacing code objects does not always succeed: changing a @property |
|
439 | - Replacing code objects does not always succeed: changing a @property | |
440 | in a class to an ordinary method or a method to a member variable |
|
440 | in a class to an ordinary method or a method to a member variable | |
441 | can cause problems (but in old objects only). |
|
441 | can cause problems (but in old objects only). | |
442 |
|
442 | |||
443 | - Functions that are removed (eg. via monkey-patching) from a module |
|
443 | - Functions that are removed (eg. via monkey-patching) from a module | |
444 | before it is reloaded are not upgraded. |
|
444 | before it is reloaded are not upgraded. | |
445 |
|
445 | |||
446 | - C extension modules cannot be reloaded, and so cannot be |
|
446 | - C extension modules cannot be reloaded, and so cannot be | |
447 | autoreloaded. |
|
447 | autoreloaded. | |
448 |
|
448 | |||
449 | """ |
|
449 | """ | |
450 | if parameter_s == '': |
|
450 | if parameter_s == '': | |
451 | self._reloader.check(True) |
|
451 | self._reloader.check(True) | |
452 | elif parameter_s == '0': |
|
452 | elif parameter_s == '0': | |
453 | self._reloader.enabled = False |
|
453 | self._reloader.enabled = False | |
454 | elif parameter_s == '1': |
|
454 | elif parameter_s == '1': | |
455 | self._reloader.check_all = False |
|
455 | self._reloader.check_all = False | |
456 | self._reloader.enabled = True |
|
456 | self._reloader.enabled = True | |
457 | elif parameter_s == '2': |
|
457 | elif parameter_s == '2': | |
458 | self._reloader.check_all = True |
|
458 | self._reloader.check_all = True | |
459 | self._reloader.enabled = True |
|
459 | self._reloader.enabled = True | |
460 |
|
460 | |||
461 | @line_magic |
|
461 | @line_magic | |
462 | def aimport(self, parameter_s='', stream=None): |
|
462 | def aimport(self, parameter_s='', stream=None): | |
463 | """%aimport => Import modules for automatic reloading. |
|
463 | """%aimport => Import modules for automatic reloading. | |
464 |
|
464 | |||
465 | %aimport |
|
465 | %aimport | |
466 | List modules to automatically import and not to import. |
|
466 | List modules to automatically import and not to import. | |
467 |
|
467 | |||
468 | %aimport foo |
|
468 | %aimport foo | |
469 | Import module 'foo' and mark it to be autoreloaded for %autoreload 1 |
|
469 | Import module 'foo' and mark it to be autoreloaded for %autoreload 1 | |
470 |
|
470 | |||
471 | %aimport -foo |
|
471 | %aimport -foo | |
472 | Mark module 'foo' to not be autoreloaded for %autoreload 1 |
|
472 | Mark module 'foo' to not be autoreloaded for %autoreload 1 | |
473 | """ |
|
473 | """ | |
474 | modname = parameter_s |
|
474 | modname = parameter_s | |
475 | if not modname: |
|
475 | if not modname: | |
476 | to_reload = self._reloader.modules.keys() |
|
476 | to_reload = sorted(self._reloader.modules.keys()) | |
477 | to_reload.sort() |
|
477 | to_skip = sorted(self._reloader.skip_modules.keys()) | |
478 | to_skip = self._reloader.skip_modules.keys() |
|
|||
479 | to_skip.sort() |
|
478 | to_skip.sort() | |
480 | if stream is None: |
|
479 | if stream is None: | |
481 | stream = sys.stdout |
|
480 | stream = sys.stdout | |
482 | if self._reloader.check_all: |
|
481 | if self._reloader.check_all: | |
483 | stream.write("Modules to reload:\nall-except-skipped\n") |
|
482 | stream.write("Modules to reload:\nall-except-skipped\n") | |
484 | else: |
|
483 | else: | |
485 | stream.write("Modules to reload:\n%s\n" % ' '.join(to_reload)) |
|
484 | stream.write("Modules to reload:\n%s\n" % ' '.join(to_reload)) | |
486 | stream.write("\nModules to skip:\n%s\n" % ' '.join(to_skip)) |
|
485 | stream.write("\nModules to skip:\n%s\n" % ' '.join(to_skip)) | |
487 | elif modname.startswith('-'): |
|
486 | elif modname.startswith('-'): | |
488 | modname = modname[1:] |
|
487 | modname = modname[1:] | |
489 | self._reloader.mark_module_skipped(modname) |
|
488 | self._reloader.mark_module_skipped(modname) | |
490 | else: |
|
489 | else: | |
491 | top_module, top_name = self._reloader.aimport_module(modname) |
|
490 | top_module, top_name = self._reloader.aimport_module(modname) | |
492 |
|
491 | |||
493 | # Inject module to user namespace |
|
492 | # Inject module to user namespace | |
494 | self.shell.push({top_name: top_module}) |
|
493 | self.shell.push({top_name: top_module}) | |
495 |
|
494 | |||
496 | def pre_run_code_hook(self, ip): |
|
495 | def pre_run_code_hook(self, ip): | |
497 | if not self._reloader.enabled: |
|
496 | if not self._reloader.enabled: | |
498 | raise TryNext |
|
497 | raise TryNext | |
499 | try: |
|
498 | try: | |
500 | self._reloader.check() |
|
499 | self._reloader.check() | |
501 | except: |
|
500 | except: | |
502 | pass |
|
501 | pass | |
503 |
|
502 | |||
504 |
|
503 | |||
505 | def load_ipython_extension(ip): |
|
504 | def load_ipython_extension(ip): | |
506 | """Load the extension in IPython.""" |
|
505 | """Load the extension in IPython.""" | |
507 | auto_reload = AutoreloadMagics(ip) |
|
506 | auto_reload = AutoreloadMagics(ip) | |
508 | ip.register_magics(auto_reload) |
|
507 | ip.register_magics(auto_reload) | |
509 | ip.set_hook('pre_run_code_hook', auto_reload.pre_run_code_hook) |
|
508 | ip.set_hook('pre_run_code_hook', auto_reload.pre_run_code_hook) |
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