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@@ -1,250 +1,233 b'' | |||||
1 | # coding: utf-8 |
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1 | # coding: utf-8 | |
2 | """Compatibility tricks for Python 3. Mainly to do with unicode. |
|
2 | """Compatibility tricks for Python 3. Mainly to do with unicode. | |
3 |
|
3 | |||
4 | This file is deprecated and will be removed in a future version. |
|
4 | This file is deprecated and will be removed in a future version. | |
5 | """ |
|
5 | """ | |
6 | import functools |
|
6 | import functools | |
7 | import os |
|
7 | import os | |
8 | import sys |
|
8 | import sys | |
9 | import re |
|
9 | import re | |
10 | import shutil |
|
10 | import shutil | |
11 | import types |
|
11 | import types | |
12 | import platform |
|
12 | import platform | |
13 |
|
13 | |||
14 | from .encoding import DEFAULT_ENCODING |
|
14 | from .encoding import DEFAULT_ENCODING | |
15 |
|
15 | |||
16 | def no_code(x, encoding=None): |
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|||
17 | return x |
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18 |
|
16 | |||
19 | def decode(s, encoding=None): |
|
17 | def decode(s, encoding=None): | |
20 | encoding = encoding or DEFAULT_ENCODING |
|
18 | encoding = encoding or DEFAULT_ENCODING | |
21 | return s.decode(encoding, "replace") |
|
19 | return s.decode(encoding, "replace") | |
22 |
|
20 | |||
23 | def encode(u, encoding=None): |
|
21 | def encode(u, encoding=None): | |
24 | encoding = encoding or DEFAULT_ENCODING |
|
22 | encoding = encoding or DEFAULT_ENCODING | |
25 | return u.encode(encoding, "replace") |
|
23 | return u.encode(encoding, "replace") | |
26 |
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24 | |||
27 |
|
25 | |||
28 | def cast_unicode(s, encoding=None): |
|
26 | def cast_unicode(s, encoding=None): | |
29 | if isinstance(s, bytes): |
|
27 | if isinstance(s, bytes): | |
30 | return decode(s, encoding) |
|
28 | return decode(s, encoding) | |
31 | return s |
|
29 | return s | |
32 |
|
30 | |||
33 | def cast_bytes(s, encoding=None): |
|
31 | def cast_bytes(s, encoding=None): | |
34 | if not isinstance(s, bytes): |
|
32 | if not isinstance(s, bytes): | |
35 | return encode(s, encoding) |
|
33 | return encode(s, encoding) | |
36 | return s |
|
34 | return s | |
37 |
|
35 | |||
38 | def buffer_to_bytes(buf): |
|
36 | def buffer_to_bytes(buf): | |
39 | """Cast a buffer object to bytes""" |
|
37 | """Cast a buffer object to bytes""" | |
40 | if not isinstance(buf, bytes): |
|
38 | if not isinstance(buf, bytes): | |
41 | buf = bytes(buf) |
|
39 | buf = bytes(buf) | |
42 | return buf |
|
40 | return buf | |
43 |
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41 | |||
44 | def _modify_str_or_docstring(str_change_func): |
|
42 | def _modify_str_or_docstring(str_change_func): | |
45 | @functools.wraps(str_change_func) |
|
43 | @functools.wraps(str_change_func) | |
46 | def wrapper(func_or_str): |
|
44 | def wrapper(func_or_str): | |
47 |
if isinstance(func_or_str, |
|
45 | if isinstance(func_or_str, (str,)): | |
48 | func = None |
|
46 | func = None | |
49 | doc = func_or_str |
|
47 | doc = func_or_str | |
50 | else: |
|
48 | else: | |
51 | func = func_or_str |
|
49 | func = func_or_str | |
52 | doc = func.__doc__ |
|
50 | doc = func.__doc__ | |
53 |
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51 | |||
54 | # PYTHONOPTIMIZE=2 strips docstrings, so they can disappear unexpectedly |
|
52 | # PYTHONOPTIMIZE=2 strips docstrings, so they can disappear unexpectedly | |
55 | if doc is not None: |
|
53 | if doc is not None: | |
56 | doc = str_change_func(doc) |
|
54 | doc = str_change_func(doc) | |
57 |
|
55 | |||
58 | if func: |
|
56 | if func: | |
59 | func.__doc__ = doc |
|
57 | func.__doc__ = doc | |
60 | return func |
|
58 | return func | |
61 | return doc |
|
59 | return doc | |
62 | return wrapper |
|
60 | return wrapper | |
63 |
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61 | |||
64 | def safe_unicode(e): |
|
62 | def safe_unicode(e): | |
65 | """unicode(e) with various fallbacks. Used for exceptions, which may not be |
|
63 | """unicode(e) with various fallbacks. Used for exceptions, which may not be | |
66 | safe to call unicode() on. |
|
64 | safe to call unicode() on. | |
67 | """ |
|
65 | """ | |
68 | try: |
|
66 | try: | |
69 |
return |
|
67 | return str(e) | |
70 | except UnicodeError: |
|
68 | except UnicodeError: | |
71 | pass |
|
69 | pass | |
72 |
|
70 | |||
73 | try: |
|
71 | try: | |
74 |
return |
|
72 | return repr(e) | |
75 | except UnicodeError: |
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|||
76 | pass |
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77 |
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||||
78 | try: |
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79 | return str_to_unicode(repr(e)) |
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|||
80 | except UnicodeError: |
|
73 | except UnicodeError: | |
81 | pass |
|
74 | pass | |
82 |
|
75 | |||
83 | return u'Unrecoverably corrupt evalue' |
|
76 | return u'Unrecoverably corrupt evalue' | |
84 |
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77 | |||
85 | # shutil.which from Python 3.4 |
|
78 | # shutil.which from Python 3.4 | |
86 | def _shutil_which(cmd, mode=os.F_OK | os.X_OK, path=None): |
|
79 | def _shutil_which(cmd, mode=os.F_OK | os.X_OK, path=None): | |
87 | """Given a command, mode, and a PATH string, return the path which |
|
80 | """Given a command, mode, and a PATH string, return the path which | |
88 | conforms to the given mode on the PATH, or None if there is no such |
|
81 | conforms to the given mode on the PATH, or None if there is no such | |
89 | file. |
|
82 | file. | |
90 |
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83 | |||
91 | `mode` defaults to os.F_OK | os.X_OK. `path` defaults to the result |
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84 | `mode` defaults to os.F_OK | os.X_OK. `path` defaults to the result | |
92 | of os.environ.get("PATH"), or can be overridden with a custom search |
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85 | of os.environ.get("PATH"), or can be overridden with a custom search | |
93 | path. |
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86 | path. | |
94 |
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87 | |||
95 | This is a backport of shutil.which from Python 3.4 |
|
88 | This is a backport of shutil.which from Python 3.4 | |
96 | """ |
|
89 | """ | |
97 | # Check that a given file can be accessed with the correct mode. |
|
90 | # Check that a given file can be accessed with the correct mode. | |
98 | # Additionally check that `file` is not a directory, as on Windows |
|
91 | # Additionally check that `file` is not a directory, as on Windows | |
99 | # directories pass the os.access check. |
|
92 | # directories pass the os.access check. | |
100 | def _access_check(fn, mode): |
|
93 | def _access_check(fn, mode): | |
101 | return (os.path.exists(fn) and os.access(fn, mode) |
|
94 | return (os.path.exists(fn) and os.access(fn, mode) | |
102 | and not os.path.isdir(fn)) |
|
95 | and not os.path.isdir(fn)) | |
103 |
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96 | |||
104 | # If we're given a path with a directory part, look it up directly rather |
|
97 | # If we're given a path with a directory part, look it up directly rather | |
105 | # than referring to PATH directories. This includes checking relative to the |
|
98 | # than referring to PATH directories. This includes checking relative to the | |
106 | # current directory, e.g. ./script |
|
99 | # current directory, e.g. ./script | |
107 | if os.path.dirname(cmd): |
|
100 | if os.path.dirname(cmd): | |
108 | if _access_check(cmd, mode): |
|
101 | if _access_check(cmd, mode): | |
109 | return cmd |
|
102 | return cmd | |
110 | return None |
|
103 | return None | |
111 |
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104 | |||
112 | if path is None: |
|
105 | if path is None: | |
113 | path = os.environ.get("PATH", os.defpath) |
|
106 | path = os.environ.get("PATH", os.defpath) | |
114 | if not path: |
|
107 | if not path: | |
115 | return None |
|
108 | return None | |
116 | path = path.split(os.pathsep) |
|
109 | path = path.split(os.pathsep) | |
117 |
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110 | |||
118 | if sys.platform == "win32": |
|
111 | if sys.platform == "win32": | |
119 | # The current directory takes precedence on Windows. |
|
112 | # The current directory takes precedence on Windows. | |
120 | if not os.curdir in path: |
|
113 | if not os.curdir in path: | |
121 | path.insert(0, os.curdir) |
|
114 | path.insert(0, os.curdir) | |
122 |
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115 | |||
123 | # PATHEXT is necessary to check on Windows. |
|
116 | # PATHEXT is necessary to check on Windows. | |
124 | pathext = os.environ.get("PATHEXT", "").split(os.pathsep) |
|
117 | pathext = os.environ.get("PATHEXT", "").split(os.pathsep) | |
125 | # See if the given file matches any of the expected path extensions. |
|
118 | # See if the given file matches any of the expected path extensions. | |
126 | # This will allow us to short circuit when given "python.exe". |
|
119 | # This will allow us to short circuit when given "python.exe". | |
127 | # If it does match, only test that one, otherwise we have to try |
|
120 | # If it does match, only test that one, otherwise we have to try | |
128 | # others. |
|
121 | # others. | |
129 | if any(cmd.lower().endswith(ext.lower()) for ext in pathext): |
|
122 | if any(cmd.lower().endswith(ext.lower()) for ext in pathext): | |
130 | files = [cmd] |
|
123 | files = [cmd] | |
131 | else: |
|
124 | else: | |
132 | files = [cmd + ext for ext in pathext] |
|
125 | files = [cmd + ext for ext in pathext] | |
133 | else: |
|
126 | else: | |
134 | # On other platforms you don't have things like PATHEXT to tell you |
|
127 | # On other platforms you don't have things like PATHEXT to tell you | |
135 | # what file suffixes are executable, so just pass on cmd as-is. |
|
128 | # what file suffixes are executable, so just pass on cmd as-is. | |
136 | files = [cmd] |
|
129 | files = [cmd] | |
137 |
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130 | |||
138 | seen = set() |
|
131 | seen = set() | |
139 | for dir in path: |
|
132 | for dir in path: | |
140 | normdir = os.path.normcase(dir) |
|
133 | normdir = os.path.normcase(dir) | |
141 | if not normdir in seen: |
|
134 | if not normdir in seen: | |
142 | seen.add(normdir) |
|
135 | seen.add(normdir) | |
143 | for thefile in files: |
|
136 | for thefile in files: | |
144 | name = os.path.join(dir, thefile) |
|
137 | name = os.path.join(dir, thefile) | |
145 | if _access_check(name, mode): |
|
138 | if _access_check(name, mode): | |
146 | return name |
|
139 | return name | |
147 | return None |
|
140 | return None | |
148 |
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141 | |||
149 | PY3 = True |
|
142 | PY3 = True | |
150 |
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143 | |||
151 | # keep reference to builtin_mod because the kernel overrides that value |
|
144 | # keep reference to builtin_mod because the kernel overrides that value | |
152 | # to forward requests to a frontend. |
|
145 | # to forward requests to a frontend. | |
153 | def input(prompt=''): |
|
146 | def input(prompt=''): | |
154 | return builtin_mod.input(prompt) |
|
147 | return builtin_mod.input(prompt) | |
155 |
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148 | |||
156 | builtin_mod_name = "builtins" |
|
149 | builtin_mod_name = "builtins" | |
157 | import builtins as builtin_mod |
|
150 | import builtins as builtin_mod | |
158 |
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151 | |||
159 | str_to_unicode = no_code |
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160 | unicode_to_str = no_code |
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161 | str_to_bytes = encode |
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162 | bytes_to_str = decode |
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163 | cast_bytes_py2 = no_code |
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164 | cast_unicode_py2 = no_code |
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165 | buffer_to_bytes_py2 = no_code |
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166 |
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167 | string_types = (str,) |
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168 | unicode_type = str |
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169 |
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152 | |||
170 | which = shutil.which |
|
153 | which = shutil.which | |
171 |
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154 | |||
172 | def isidentifier(s, dotted=False): |
|
155 | def isidentifier(s, dotted=False): | |
173 | if dotted: |
|
156 | if dotted: | |
174 | return all(isidentifier(a) for a in s.split(".")) |
|
157 | return all(isidentifier(a) for a in s.split(".")) | |
175 | return s.isidentifier() |
|
158 | return s.isidentifier() | |
176 |
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159 | |||
177 | xrange = range |
|
160 | xrange = range | |
178 | def iteritems(d): return iter(d.items()) |
|
161 | def iteritems(d): return iter(d.items()) | |
179 | def itervalues(d): return iter(d.values()) |
|
162 | def itervalues(d): return iter(d.values()) | |
180 | getcwd = os.getcwd |
|
163 | getcwd = os.getcwd | |
181 |
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164 | |||
182 | MethodType = types.MethodType |
|
165 | MethodType = types.MethodType | |
183 |
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166 | |||
184 | def execfile(fname, glob, loc=None, compiler=None): |
|
167 | def execfile(fname, glob, loc=None, compiler=None): | |
185 | loc = loc if (loc is not None) else glob |
|
168 | loc = loc if (loc is not None) else glob | |
186 | with open(fname, 'rb') as f: |
|
169 | with open(fname, 'rb') as f: | |
187 | compiler = compiler or compile |
|
170 | compiler = compiler or compile | |
188 | exec(compiler(f.read(), fname, 'exec'), glob, loc) |
|
171 | exec(compiler(f.read(), fname, 'exec'), glob, loc) | |
189 |
|
172 | |||
190 | # Refactor print statements in doctests. |
|
173 | # Refactor print statements in doctests. | |
191 | _print_statement_re = re.compile(r"\bprint (?P<expr>.*)$", re.MULTILINE) |
|
174 | _print_statement_re = re.compile(r"\bprint (?P<expr>.*)$", re.MULTILINE) | |
192 | def _print_statement_sub(match): |
|
175 | def _print_statement_sub(match): | |
193 | expr = match.groups('expr') |
|
176 | expr = match.groups('expr') | |
194 | return "print(%s)" % expr |
|
177 | return "print(%s)" % expr | |
195 |
|
178 | |||
196 | # Abstract u'abc' syntax: |
|
179 | # Abstract u'abc' syntax: | |
197 | @_modify_str_or_docstring |
|
180 | @_modify_str_or_docstring | |
198 | def u_format(s): |
|
181 | def u_format(s): | |
199 | """"{u}'abc'" --> "'abc'" (Python 3) |
|
182 | """"{u}'abc'" --> "'abc'" (Python 3) | |
200 |
|
183 | |||
201 | Accepts a string or a function, so it can be used as a decorator.""" |
|
184 | Accepts a string or a function, so it can be used as a decorator.""" | |
202 | return s.format(u='') |
|
185 | return s.format(u='') | |
203 |
|
186 | |||
204 | def get_closure(f): |
|
187 | def get_closure(f): | |
205 | """Get a function's closure attribute""" |
|
188 | """Get a function's closure attribute""" | |
206 | return f.__closure__ |
|
189 | return f.__closure__ | |
207 |
|
190 | |||
208 |
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191 | |||
209 | PY2 = not PY3 |
|
192 | PY2 = not PY3 | |
210 | PYPY = platform.python_implementation() == "PyPy" |
|
193 | PYPY = platform.python_implementation() == "PyPy" | |
211 |
|
194 | |||
212 |
|
195 | |||
213 | def annotate(**kwargs): |
|
196 | def annotate(**kwargs): | |
214 | """Python 3 compatible function annotation for Python 2.""" |
|
197 | """Python 3 compatible function annotation for Python 2.""" | |
215 | if not kwargs: |
|
198 | if not kwargs: | |
216 | raise ValueError('annotations must be provided as keyword arguments') |
|
199 | raise ValueError('annotations must be provided as keyword arguments') | |
217 | def dec(f): |
|
200 | def dec(f): | |
218 | if hasattr(f, '__annotations__'): |
|
201 | if hasattr(f, '__annotations__'): | |
219 | for k, v in kwargs.items(): |
|
202 | for k, v in kwargs.items(): | |
220 | f.__annotations__[k] = v |
|
203 | f.__annotations__[k] = v | |
221 | else: |
|
204 | else: | |
222 | f.__annotations__ = kwargs |
|
205 | f.__annotations__ = kwargs | |
223 | return f |
|
206 | return f | |
224 | return dec |
|
207 | return dec | |
225 |
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208 | |||
226 |
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209 | |||
227 | # Parts below taken from six: |
|
210 | # Parts below taken from six: | |
228 | # Copyright (c) 2010-2013 Benjamin Peterson |
|
211 | # Copyright (c) 2010-2013 Benjamin Peterson | |
229 | # |
|
212 | # | |
230 | # Permission is hereby granted, free of charge, to any person obtaining a copy |
|
213 | # Permission is hereby granted, free of charge, to any person obtaining a copy | |
231 | # of this software and associated documentation files (the "Software"), to deal |
|
214 | # of this software and associated documentation files (the "Software"), to deal | |
232 | # in the Software without restriction, including without limitation the rights |
|
215 | # in the Software without restriction, including without limitation the rights | |
233 | # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
|
216 | # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
234 | # copies of the Software, and to permit persons to whom the Software is |
|
217 | # copies of the Software, and to permit persons to whom the Software is | |
235 | # furnished to do so, subject to the following conditions: |
|
218 | # furnished to do so, subject to the following conditions: | |
236 | # |
|
219 | # | |
237 | # The above copyright notice and this permission notice shall be included in all |
|
220 | # The above copyright notice and this permission notice shall be included in all | |
238 | # copies or substantial portions of the Software. |
|
221 | # copies or substantial portions of the Software. | |
239 | # |
|
222 | # | |
240 | # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
|
223 | # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
241 | # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
|
224 | # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
242 | # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
|
225 | # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
243 | # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
|
226 | # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
244 | # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
|
227 | # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
245 | # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
|
228 | # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
246 | # SOFTWARE. |
|
229 | # SOFTWARE. | |
247 |
|
230 | |||
248 | def with_metaclass(meta, *bases): |
|
231 | def with_metaclass(meta, *bases): | |
249 | """Create a base class with a metaclass.""" |
|
232 | """Create a base class with a metaclass.""" | |
250 | return meta("_NewBase", bases, {}) |
|
233 | return meta("_NewBase", bases, {}) |
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