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@@ -1,127 +1,151 b'' | |||||
1 | # coding: utf-8 |
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1 | # coding: utf-8 | |
2 | """Compatibility tricks for Python 3. Mainly to do with unicode.""" |
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2 | """Compatibility tricks for Python 3. Mainly to do with unicode.""" | |
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3 | import functools | |||
3 | import sys |
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4 | import sys | |
4 | import re |
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5 | import re | |
5 | import types |
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6 | import types | |
6 |
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7 | |||
7 | orig_open = open |
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8 | orig_open = open | |
8 |
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9 | |||
9 | def no_code(x, encoding=None): |
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10 | def no_code(x, encoding=None): | |
10 | return x |
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11 | return x | |
11 |
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12 | |||
12 | def decode(s, encoding=None): |
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13 | def decode(s, encoding=None): | |
13 | encoding = encoding or sys.stdin.encoding or sys.getdefaultencoding() |
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14 | encoding = encoding or sys.stdin.encoding or sys.getdefaultencoding() | |
14 | return s.decode(encoding, "replace") |
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15 | return s.decode(encoding, "replace") | |
15 |
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16 | |||
16 | def encode(u, encoding=None): |
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17 | def encode(u, encoding=None): | |
17 | encoding = encoding or sys.stdin.encoding or sys.getdefaultencoding() |
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18 | encoding = encoding or sys.stdin.encoding or sys.getdefaultencoding() | |
18 | return u.encode(encoding, "replace") |
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19 | return u.encode(encoding, "replace") | |
19 |
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20 | |||
20 | def cast_unicode(s, encoding=None): |
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21 | def cast_unicode(s, encoding=None): | |
21 | if isinstance(s, bytes): |
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22 | if isinstance(s, bytes): | |
22 | return decode(s, encoding) |
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23 | return decode(s, encoding) | |
23 | return s |
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24 | return s | |
24 |
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25 | |||
25 | def cast_bytes(s, encoding=None): |
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26 | def cast_bytes(s, encoding=None): | |
26 | if not isinstance(s, bytes): |
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27 | if not isinstance(s, bytes): | |
27 | return encode(s, encoding) |
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28 | return encode(s, encoding) | |
28 | return s |
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29 | return s | |
29 |
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30 | |||
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31 | def _modify_str_or_docstring(str_change_func): | |||
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32 | @functools.wraps(str_change_func) | |||
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33 | def wrapper(func_or_str): | |||
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34 | if isinstance(func_or_str, str): | |||
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35 | func = None | |||
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36 | doc = func_or_str | |||
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37 | else: | |||
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38 | func = func_or_str | |||
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39 | doc = func.__doc__ | |||
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40 | ||||
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41 | doc = str_change_func(doc) | |||
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42 | ||||
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43 | if func: | |||
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44 | func.__doc__ = doc | |||
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45 | return func | |||
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46 | return doc | |||
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47 | return wrapper | |||
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48 | ||||
30 | if sys.version_info[0] >= 3: |
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49 | if sys.version_info[0] >= 3: | |
31 | PY3 = True |
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50 | PY3 = True | |
32 |
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51 | |||
33 | input = input |
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52 | input = input | |
34 | builtin_mod_name = "builtins" |
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53 | builtin_mod_name = "builtins" | |
35 |
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54 | |||
36 | str_to_unicode = no_code |
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55 | str_to_unicode = no_code | |
37 | unicode_to_str = no_code |
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56 | unicode_to_str = no_code | |
38 | str_to_bytes = encode |
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57 | str_to_bytes = encode | |
39 | bytes_to_str = decode |
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58 | bytes_to_str = decode | |
40 | cast_bytes_py2 = no_code |
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59 | cast_bytes_py2 = no_code | |
41 |
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60 | |||
42 | def isidentifier(s, dotted=False): |
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61 | def isidentifier(s, dotted=False): | |
43 | if dotted: |
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62 | if dotted: | |
44 | return all(isidentifier(a) for a in s.split(".")) |
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63 | return all(isidentifier(a) for a in s.split(".")) | |
45 | return s.isidentifier() |
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64 | return s.isidentifier() | |
46 |
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65 | |||
47 | open = orig_open |
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66 | open = orig_open | |
48 |
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67 | |||
49 | MethodType = types.MethodType |
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68 | MethodType = types.MethodType | |
50 |
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69 | |||
51 | def execfile(fname, glob, loc=None): |
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70 | def execfile(fname, glob, loc=None): | |
52 | loc = loc if (loc is not None) else glob |
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71 | loc = loc if (loc is not None) else glob | |
53 | exec compile(open(fname).read(), fname, 'exec') in glob, loc |
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72 | exec compile(open(fname).read(), fname, 'exec') in glob, loc | |
54 |
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73 | |||
55 | # Refactor print statements in doctests. |
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74 | # Refactor print statements in doctests. | |
56 | _print_statement_re = re.compile(r"\bprint (?P<expr>.*)$", re.MULTILINE) |
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75 | _print_statement_re = re.compile(r"\bprint (?P<expr>.*)$", re.MULTILINE) | |
57 | def _print_statement_sub(match): |
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76 | def _print_statement_sub(match): | |
58 | expr = match.groups('expr') |
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77 | expr = match.groups('expr') | |
59 | return "print(%s)" % expr |
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78 | return "print(%s)" % expr | |
60 | def doctest_refactor_print(func_or_str): |
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79 | ||
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80 | @_modify_str_or_docstring | |||
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81 | def doctest_refactor_print(doc): | |||
61 | """Refactor 'print x' statements in a doctest to print(x) style. 2to3 |
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82 | """Refactor 'print x' statements in a doctest to print(x) style. 2to3 | |
62 | unfortunately doesn't pick up on our doctests. |
|
83 | unfortunately doesn't pick up on our doctests. | |
63 |
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84 | |||
64 | Can accept a string or a function, so it can be used as a decorator.""" |
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85 | Can accept a string or a function, so it can be used as a decorator.""" | |
65 | if isinstance(func_or_str, str): |
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86 | return _print_statement_re.sub(_print_statement_sub, doc) | |
66 | func = None |
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|||
67 | doc = func_or_str |
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|||
68 | else: |
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|||
69 | func = func_or_str |
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|||
70 | doc = func.__doc__ |
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|||
71 | doc = _print_statement_re.sub(_print_statement_sub, doc) |
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|||
72 |
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87 | ||
73 | if func: |
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88 | # Abstract u'abc' syntax: | |
74 | func.__doc__ = doc |
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89 | @_modify_str_or_docstring | |
75 | return func |
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90 | def u_format(s): | |
76 | return doc |
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91 | """"{u}'abc'" --> "'abc'" (Python 3) | |
77 |
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92 | ||
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93 | Accepts a string or a function, so it can be used as a decorator.""" | |||
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94 | return s.format(u='') | |||
78 |
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95 | |||
79 | else: |
|
96 | else: | |
80 | PY3 = False |
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97 | PY3 = False | |
81 |
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98 | |||
82 | input = raw_input |
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99 | input = raw_input | |
83 | builtin_mod_name = "__builtin__" |
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100 | builtin_mod_name = "__builtin__" | |
84 |
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101 | |||
85 | str_to_unicode = decode |
|
102 | str_to_unicode = decode | |
86 | unicode_to_str = encode |
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103 | unicode_to_str = encode | |
87 | str_to_bytes = no_code |
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104 | str_to_bytes = no_code | |
88 | bytes_to_str = no_code |
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105 | bytes_to_str = no_code | |
89 | cast_bytes_py2 = cast_bytes |
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106 | cast_bytes_py2 = cast_bytes | |
90 |
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107 | |||
91 | import re |
|
108 | import re | |
92 | _name_re = re.compile(r"[a-zA-Z_][a-zA-Z0-9_]*$") |
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109 | _name_re = re.compile(r"[a-zA-Z_][a-zA-Z0-9_]*$") | |
93 | def isidentifier(s, dotted=False): |
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110 | def isidentifier(s, dotted=False): | |
94 | if dotted: |
|
111 | if dotted: | |
95 | return all(isidentifier(a) for a in s.split(".")) |
|
112 | return all(isidentifier(a) for a in s.split(".")) | |
96 | return bool(_name_re.match(s)) |
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113 | return bool(_name_re.match(s)) | |
97 |
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114 | |||
98 | class open(object): |
|
115 | class open(object): | |
99 | """Wrapper providing key part of Python 3 open() interface.""" |
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116 | """Wrapper providing key part of Python 3 open() interface.""" | |
100 | def __init__(self, fname, mode="r", encoding="utf-8"): |
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117 | def __init__(self, fname, mode="r", encoding="utf-8"): | |
101 | self.f = orig_open(fname, mode) |
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118 | self.f = orig_open(fname, mode) | |
102 | self.enc = encoding |
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119 | self.enc = encoding | |
103 |
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120 | |||
104 | def write(self, s): |
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121 | def write(self, s): | |
105 | return self.f.write(s.encode(self.enc)) |
|
122 | return self.f.write(s.encode(self.enc)) | |
106 |
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123 | |||
107 | def read(self, size=-1): |
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124 | def read(self, size=-1): | |
108 | return self.f.read(size).decode(self.enc) |
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125 | return self.f.read(size).decode(self.enc) | |
109 |
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126 | |||
110 | def close(self): |
|
127 | def close(self): | |
111 | return self.f.close() |
|
128 | return self.f.close() | |
112 |
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129 | |||
113 | def __enter__(self): |
|
130 | def __enter__(self): | |
114 | return self |
|
131 | return self | |
115 |
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132 | |||
116 | def __exit__(self, etype, value, traceback): |
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133 | def __exit__(self, etype, value, traceback): | |
117 | self.f.close() |
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134 | self.f.close() | |
118 |
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135 | |||
119 | def MethodType(func, instance): |
|
136 | def MethodType(func, instance): | |
120 | return types.MethodType(func, instance, type(instance)) |
|
137 | return types.MethodType(func, instance, type(instance)) | |
121 |
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138 | |||
122 | # don't override system execfile on 2.x: |
|
139 | # don't override system execfile on 2.x: | |
123 | execfile = execfile |
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140 | execfile = execfile | |
124 |
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141 | |||
125 | def doctest_refactor_print(func_or_str): |
|
142 | def doctest_refactor_print(func_or_str): | |
126 | return func_or_str |
|
143 | return func_or_str | |
127 |
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144 | |||
|
145 | # Abstract u'abc' syntax: | |||
|
146 | @_modify_str_or_docstring | |||
|
147 | def u_format(s): | |||
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148 | """"{u}'abc'" --> "u'abc'" (Python 2) | |||
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149 | ||||
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150 | Accepts a string or a function, so it can be used as a decorator.""" | |||
|
151 | return s.format(u='u') |
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