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comparison lib/python3.8/site-packages/setuptools/_vendor/six.py @ 1:64071f2a4cf0 draft default tip

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author guerler
date Mon, 27 Jul 2020 03:55:49 -0400
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0:9e54283cc701 1:64071f2a4cf0
1 """Utilities for writing code that runs on Python 2 and 3"""
2
3 # Copyright (c) 2010-2015 Benjamin Peterson
4 #
5 # Permission is hereby granted, free of charge, to any person obtaining a copy
6 # of this software and associated documentation files (the "Software"), to deal
7 # in the Software without restriction, including without limitation the rights
8 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 # copies of the Software, and to permit persons to whom the Software is
10 # furnished to do so, subject to the following conditions:
11 #
12 # The above copyright notice and this permission notice shall be included in all
13 # copies or substantial portions of the Software.
14 #
15 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 # SOFTWARE.
22
23 from __future__ import absolute_import
24
25 import functools
26 import itertools
27 import operator
28 import sys
29 import types
30
31 __author__ = "Benjamin Peterson <benjamin@python.org>"
32 __version__ = "1.10.0"
33
34
35 # Useful for very coarse version differentiation.
36 PY2 = sys.version_info[0] == 2
37 PY3 = sys.version_info[0] == 3
38 PY34 = sys.version_info[0:2] >= (3, 4)
39
40 if PY3:
41 string_types = str,
42 integer_types = int,
43 class_types = type,
44 text_type = str
45 binary_type = bytes
46
47 MAXSIZE = sys.maxsize
48 else:
49 string_types = basestring,
50 integer_types = (int, long)
51 class_types = (type, types.ClassType)
52 text_type = unicode
53 binary_type = str
54
55 if sys.platform.startswith("java"):
56 # Jython always uses 32 bits.
57 MAXSIZE = int((1 << 31) - 1)
58 else:
59 # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
60 class X(object):
61
62 def __len__(self):
63 return 1 << 31
64 try:
65 len(X())
66 except OverflowError:
67 # 32-bit
68 MAXSIZE = int((1 << 31) - 1)
69 else:
70 # 64-bit
71 MAXSIZE = int((1 << 63) - 1)
72 del X
73
74
75 def _add_doc(func, doc):
76 """Add documentation to a function."""
77 func.__doc__ = doc
78
79
80 def _import_module(name):
81 """Import module, returning the module after the last dot."""
82 __import__(name)
83 return sys.modules[name]
84
85
86 class _LazyDescr(object):
87
88 def __init__(self, name):
89 self.name = name
90
91 def __get__(self, obj, tp):
92 result = self._resolve()
93 setattr(obj, self.name, result) # Invokes __set__.
94 try:
95 # This is a bit ugly, but it avoids running this again by
96 # removing this descriptor.
97 delattr(obj.__class__, self.name)
98 except AttributeError:
99 pass
100 return result
101
102
103 class MovedModule(_LazyDescr):
104
105 def __init__(self, name, old, new=None):
106 super(MovedModule, self).__init__(name)
107 if PY3:
108 if new is None:
109 new = name
110 self.mod = new
111 else:
112 self.mod = old
113
114 def _resolve(self):
115 return _import_module(self.mod)
116
117 def __getattr__(self, attr):
118 _module = self._resolve()
119 value = getattr(_module, attr)
120 setattr(self, attr, value)
121 return value
122
123
124 class _LazyModule(types.ModuleType):
125
126 def __init__(self, name):
127 super(_LazyModule, self).__init__(name)
128 self.__doc__ = self.__class__.__doc__
129
130 def __dir__(self):
131 attrs = ["__doc__", "__name__"]
132 attrs += [attr.name for attr in self._moved_attributes]
133 return attrs
134
135 # Subclasses should override this
136 _moved_attributes = []
137
138
139 class MovedAttribute(_LazyDescr):
140
141 def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
142 super(MovedAttribute, self).__init__(name)
143 if PY3:
144 if new_mod is None:
145 new_mod = name
146 self.mod = new_mod
147 if new_attr is None:
148 if old_attr is None:
149 new_attr = name
150 else:
151 new_attr = old_attr
152 self.attr = new_attr
153 else:
154 self.mod = old_mod
155 if old_attr is None:
156 old_attr = name
157 self.attr = old_attr
158
159 def _resolve(self):
160 module = _import_module(self.mod)
161 return getattr(module, self.attr)
162
163
164 class _SixMetaPathImporter(object):
165
166 """
167 A meta path importer to import six.moves and its submodules.
168
169 This class implements a PEP302 finder and loader. It should be compatible
170 with Python 2.5 and all existing versions of Python3
171 """
172
173 def __init__(self, six_module_name):
174 self.name = six_module_name
175 self.known_modules = {}
176
177 def _add_module(self, mod, *fullnames):
178 for fullname in fullnames:
179 self.known_modules[self.name + "." + fullname] = mod
180
181 def _get_module(self, fullname):
182 return self.known_modules[self.name + "." + fullname]
183
184 def find_module(self, fullname, path=None):
185 if fullname in self.known_modules:
186 return self
187 return None
188
189 def __get_module(self, fullname):
190 try:
191 return self.known_modules[fullname]
192 except KeyError:
193 raise ImportError("This loader does not know module " + fullname)
194
195 def load_module(self, fullname):
196 try:
197 # in case of a reload
198 return sys.modules[fullname]
199 except KeyError:
200 pass
201 mod = self.__get_module(fullname)
202 if isinstance(mod, MovedModule):
203 mod = mod._resolve()
204 else:
205 mod.__loader__ = self
206 sys.modules[fullname] = mod
207 return mod
208
209 def is_package(self, fullname):
210 """
211 Return true, if the named module is a package.
212
213 We need this method to get correct spec objects with
214 Python 3.4 (see PEP451)
215 """
216 return hasattr(self.__get_module(fullname), "__path__")
217
218 def get_code(self, fullname):
219 """Return None
220
221 Required, if is_package is implemented"""
222 self.__get_module(fullname) # eventually raises ImportError
223 return None
224 get_source = get_code # same as get_code
225
226 _importer = _SixMetaPathImporter(__name__)
227
228
229 class _MovedItems(_LazyModule):
230
231 """Lazy loading of moved objects"""
232 __path__ = [] # mark as package
233
234
235 _moved_attributes = [
236 MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
237 MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
238 MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
239 MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
240 MovedAttribute("intern", "__builtin__", "sys"),
241 MovedAttribute("map", "itertools", "builtins", "imap", "map"),
242 MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
243 MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
244 MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
245 MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
246 MovedAttribute("reduce", "__builtin__", "functools"),
247 MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
248 MovedAttribute("StringIO", "StringIO", "io"),
249 MovedAttribute("UserDict", "UserDict", "collections"),
250 MovedAttribute("UserList", "UserList", "collections"),
251 MovedAttribute("UserString", "UserString", "collections"),
252 MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
253 MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
254 MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
255 MovedModule("builtins", "__builtin__"),
256 MovedModule("configparser", "ConfigParser"),
257 MovedModule("copyreg", "copy_reg"),
258 MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
259 MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread"),
260 MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
261 MovedModule("http_cookies", "Cookie", "http.cookies"),
262 MovedModule("html_entities", "htmlentitydefs", "html.entities"),
263 MovedModule("html_parser", "HTMLParser", "html.parser"),
264 MovedModule("http_client", "httplib", "http.client"),
265 MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
266 MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
267 MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
268 MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
269 MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
270 MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
271 MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
272 MovedModule("cPickle", "cPickle", "pickle"),
273 MovedModule("queue", "Queue"),
274 MovedModule("reprlib", "repr"),
275 MovedModule("socketserver", "SocketServer"),
276 MovedModule("_thread", "thread", "_thread"),
277 MovedModule("tkinter", "Tkinter"),
278 MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
279 MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
280 MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
281 MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
282 MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
283 MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
284 MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
285 MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
286 MovedModule("tkinter_colorchooser", "tkColorChooser",
287 "tkinter.colorchooser"),
288 MovedModule("tkinter_commondialog", "tkCommonDialog",
289 "tkinter.commondialog"),
290 MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
291 MovedModule("tkinter_font", "tkFont", "tkinter.font"),
292 MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
293 MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
294 "tkinter.simpledialog"),
295 MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
296 MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
297 MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
298 MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
299 MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
300 MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
301 ]
302 # Add windows specific modules.
303 if sys.platform == "win32":
304 _moved_attributes += [
305 MovedModule("winreg", "_winreg"),
306 ]
307
308 for attr in _moved_attributes:
309 setattr(_MovedItems, attr.name, attr)
310 if isinstance(attr, MovedModule):
311 _importer._add_module(attr, "moves." + attr.name)
312 del attr
313
314 _MovedItems._moved_attributes = _moved_attributes
315
316 moves = _MovedItems(__name__ + ".moves")
317 _importer._add_module(moves, "moves")
318
319
320 class Module_six_moves_urllib_parse(_LazyModule):
321
322 """Lazy loading of moved objects in six.moves.urllib_parse"""
323
324
325 _urllib_parse_moved_attributes = [
326 MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
327 MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
328 MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
329 MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
330 MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
331 MovedAttribute("urljoin", "urlparse", "urllib.parse"),
332 MovedAttribute("urlparse", "urlparse", "urllib.parse"),
333 MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
334 MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
335 MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
336 MovedAttribute("quote", "urllib", "urllib.parse"),
337 MovedAttribute("quote_plus", "urllib", "urllib.parse"),
338 MovedAttribute("unquote", "urllib", "urllib.parse"),
339 MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
340 MovedAttribute("urlencode", "urllib", "urllib.parse"),
341 MovedAttribute("splitquery", "urllib", "urllib.parse"),
342 MovedAttribute("splittag", "urllib", "urllib.parse"),
343 MovedAttribute("splituser", "urllib", "urllib.parse"),
344 MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
345 MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
346 MovedAttribute("uses_params", "urlparse", "urllib.parse"),
347 MovedAttribute("uses_query", "urlparse", "urllib.parse"),
348 MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
349 ]
350 for attr in _urllib_parse_moved_attributes:
351 setattr(Module_six_moves_urllib_parse, attr.name, attr)
352 del attr
353
354 Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
355
356 _importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
357 "moves.urllib_parse", "moves.urllib.parse")
358
359
360 class Module_six_moves_urllib_error(_LazyModule):
361
362 """Lazy loading of moved objects in six.moves.urllib_error"""
363
364
365 _urllib_error_moved_attributes = [
366 MovedAttribute("URLError", "urllib2", "urllib.error"),
367 MovedAttribute("HTTPError", "urllib2", "urllib.error"),
368 MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
369 ]
370 for attr in _urllib_error_moved_attributes:
371 setattr(Module_six_moves_urllib_error, attr.name, attr)
372 del attr
373
374 Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
375
376 _importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
377 "moves.urllib_error", "moves.urllib.error")
378
379
380 class Module_six_moves_urllib_request(_LazyModule):
381
382 """Lazy loading of moved objects in six.moves.urllib_request"""
383
384
385 _urllib_request_moved_attributes = [
386 MovedAttribute("urlopen", "urllib2", "urllib.request"),
387 MovedAttribute("install_opener", "urllib2", "urllib.request"),
388 MovedAttribute("build_opener", "urllib2", "urllib.request"),
389 MovedAttribute("pathname2url", "urllib", "urllib.request"),
390 MovedAttribute("url2pathname", "urllib", "urllib.request"),
391 MovedAttribute("getproxies", "urllib", "urllib.request"),
392 MovedAttribute("Request", "urllib2", "urllib.request"),
393 MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
394 MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
395 MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
396 MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
397 MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
398 MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
399 MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
400 MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
401 MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
402 MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
403 MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
404 MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
405 MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
406 MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
407 MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
408 MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
409 MovedAttribute("FileHandler", "urllib2", "urllib.request"),
410 MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
411 MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
412 MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
413 MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
414 MovedAttribute("urlretrieve", "urllib", "urllib.request"),
415 MovedAttribute("urlcleanup", "urllib", "urllib.request"),
416 MovedAttribute("URLopener", "urllib", "urllib.request"),
417 MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
418 MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
419 ]
420 for attr in _urllib_request_moved_attributes:
421 setattr(Module_six_moves_urllib_request, attr.name, attr)
422 del attr
423
424 Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
425
426 _importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
427 "moves.urllib_request", "moves.urllib.request")
428
429
430 class Module_six_moves_urllib_response(_LazyModule):
431
432 """Lazy loading of moved objects in six.moves.urllib_response"""
433
434
435 _urllib_response_moved_attributes = [
436 MovedAttribute("addbase", "urllib", "urllib.response"),
437 MovedAttribute("addclosehook", "urllib", "urllib.response"),
438 MovedAttribute("addinfo", "urllib", "urllib.response"),
439 MovedAttribute("addinfourl", "urllib", "urllib.response"),
440 ]
441 for attr in _urllib_response_moved_attributes:
442 setattr(Module_six_moves_urllib_response, attr.name, attr)
443 del attr
444
445 Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
446
447 _importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
448 "moves.urllib_response", "moves.urllib.response")
449
450
451 class Module_six_moves_urllib_robotparser(_LazyModule):
452
453 """Lazy loading of moved objects in six.moves.urllib_robotparser"""
454
455
456 _urllib_robotparser_moved_attributes = [
457 MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
458 ]
459 for attr in _urllib_robotparser_moved_attributes:
460 setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
461 del attr
462
463 Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
464
465 _importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
466 "moves.urllib_robotparser", "moves.urllib.robotparser")
467
468
469 class Module_six_moves_urllib(types.ModuleType):
470
471 """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
472 __path__ = [] # mark as package
473 parse = _importer._get_module("moves.urllib_parse")
474 error = _importer._get_module("moves.urllib_error")
475 request = _importer._get_module("moves.urllib_request")
476 response = _importer._get_module("moves.urllib_response")
477 robotparser = _importer._get_module("moves.urllib_robotparser")
478
479 def __dir__(self):
480 return ['parse', 'error', 'request', 'response', 'robotparser']
481
482 _importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
483 "moves.urllib")
484
485
486 def add_move(move):
487 """Add an item to six.moves."""
488 setattr(_MovedItems, move.name, move)
489
490
491 def remove_move(name):
492 """Remove item from six.moves."""
493 try:
494 delattr(_MovedItems, name)
495 except AttributeError:
496 try:
497 del moves.__dict__[name]
498 except KeyError:
499 raise AttributeError("no such move, %r" % (name,))
500
501
502 if PY3:
503 _meth_func = "__func__"
504 _meth_self = "__self__"
505
506 _func_closure = "__closure__"
507 _func_code = "__code__"
508 _func_defaults = "__defaults__"
509 _func_globals = "__globals__"
510 else:
511 _meth_func = "im_func"
512 _meth_self = "im_self"
513
514 _func_closure = "func_closure"
515 _func_code = "func_code"
516 _func_defaults = "func_defaults"
517 _func_globals = "func_globals"
518
519
520 try:
521 advance_iterator = next
522 except NameError:
523 def advance_iterator(it):
524 return it.next()
525 next = advance_iterator
526
527
528 try:
529 callable = callable
530 except NameError:
531 def callable(obj):
532 return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
533
534
535 if PY3:
536 def get_unbound_function(unbound):
537 return unbound
538
539 create_bound_method = types.MethodType
540
541 def create_unbound_method(func, cls):
542 return func
543
544 Iterator = object
545 else:
546 def get_unbound_function(unbound):
547 return unbound.im_func
548
549 def create_bound_method(func, obj):
550 return types.MethodType(func, obj, obj.__class__)
551
552 def create_unbound_method(func, cls):
553 return types.MethodType(func, None, cls)
554
555 class Iterator(object):
556
557 def next(self):
558 return type(self).__next__(self)
559
560 callable = callable
561 _add_doc(get_unbound_function,
562 """Get the function out of a possibly unbound function""")
563
564
565 get_method_function = operator.attrgetter(_meth_func)
566 get_method_self = operator.attrgetter(_meth_self)
567 get_function_closure = operator.attrgetter(_func_closure)
568 get_function_code = operator.attrgetter(_func_code)
569 get_function_defaults = operator.attrgetter(_func_defaults)
570 get_function_globals = operator.attrgetter(_func_globals)
571
572
573 if PY3:
574 def iterkeys(d, **kw):
575 return iter(d.keys(**kw))
576
577 def itervalues(d, **kw):
578 return iter(d.values(**kw))
579
580 def iteritems(d, **kw):
581 return iter(d.items(**kw))
582
583 def iterlists(d, **kw):
584 return iter(d.lists(**kw))
585
586 viewkeys = operator.methodcaller("keys")
587
588 viewvalues = operator.methodcaller("values")
589
590 viewitems = operator.methodcaller("items")
591 else:
592 def iterkeys(d, **kw):
593 return d.iterkeys(**kw)
594
595 def itervalues(d, **kw):
596 return d.itervalues(**kw)
597
598 def iteritems(d, **kw):
599 return d.iteritems(**kw)
600
601 def iterlists(d, **kw):
602 return d.iterlists(**kw)
603
604 viewkeys = operator.methodcaller("viewkeys")
605
606 viewvalues = operator.methodcaller("viewvalues")
607
608 viewitems = operator.methodcaller("viewitems")
609
610 _add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
611 _add_doc(itervalues, "Return an iterator over the values of a dictionary.")
612 _add_doc(iteritems,
613 "Return an iterator over the (key, value) pairs of a dictionary.")
614 _add_doc(iterlists,
615 "Return an iterator over the (key, [values]) pairs of a dictionary.")
616
617
618 if PY3:
619 def b(s):
620 return s.encode("latin-1")
621
622 def u(s):
623 return s
624 unichr = chr
625 import struct
626 int2byte = struct.Struct(">B").pack
627 del struct
628 byte2int = operator.itemgetter(0)
629 indexbytes = operator.getitem
630 iterbytes = iter
631 import io
632 StringIO = io.StringIO
633 BytesIO = io.BytesIO
634 _assertCountEqual = "assertCountEqual"
635 if sys.version_info[1] <= 1:
636 _assertRaisesRegex = "assertRaisesRegexp"
637 _assertRegex = "assertRegexpMatches"
638 else:
639 _assertRaisesRegex = "assertRaisesRegex"
640 _assertRegex = "assertRegex"
641 else:
642 def b(s):
643 return s
644 # Workaround for standalone backslash
645
646 def u(s):
647 return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
648 unichr = unichr
649 int2byte = chr
650
651 def byte2int(bs):
652 return ord(bs[0])
653
654 def indexbytes(buf, i):
655 return ord(buf[i])
656 iterbytes = functools.partial(itertools.imap, ord)
657 import StringIO
658 StringIO = BytesIO = StringIO.StringIO
659 _assertCountEqual = "assertItemsEqual"
660 _assertRaisesRegex = "assertRaisesRegexp"
661 _assertRegex = "assertRegexpMatches"
662 _add_doc(b, """Byte literal""")
663 _add_doc(u, """Text literal""")
664
665
666 def assertCountEqual(self, *args, **kwargs):
667 return getattr(self, _assertCountEqual)(*args, **kwargs)
668
669
670 def assertRaisesRegex(self, *args, **kwargs):
671 return getattr(self, _assertRaisesRegex)(*args, **kwargs)
672
673
674 def assertRegex(self, *args, **kwargs):
675 return getattr(self, _assertRegex)(*args, **kwargs)
676
677
678 if PY3:
679 exec_ = getattr(moves.builtins, "exec")
680
681 def reraise(tp, value, tb=None):
682 if value is None:
683 value = tp()
684 if value.__traceback__ is not tb:
685 raise value.with_traceback(tb)
686 raise value
687
688 else:
689 def exec_(_code_, _globs_=None, _locs_=None):
690 """Execute code in a namespace."""
691 if _globs_ is None:
692 frame = sys._getframe(1)
693 _globs_ = frame.f_globals
694 if _locs_ is None:
695 _locs_ = frame.f_locals
696 del frame
697 elif _locs_ is None:
698 _locs_ = _globs_
699 exec("""exec _code_ in _globs_, _locs_""")
700
701 exec_("""def reraise(tp, value, tb=None):
702 raise tp, value, tb
703 """)
704
705
706 if sys.version_info[:2] == (3, 2):
707 exec_("""def raise_from(value, from_value):
708 if from_value is None:
709 raise value
710 raise value from from_value
711 """)
712 elif sys.version_info[:2] > (3, 2):
713 exec_("""def raise_from(value, from_value):
714 raise value from from_value
715 """)
716 else:
717 def raise_from(value, from_value):
718 raise value
719
720
721 print_ = getattr(moves.builtins, "print", None)
722 if print_ is None:
723 def print_(*args, **kwargs):
724 """The new-style print function for Python 2.4 and 2.5."""
725 fp = kwargs.pop("file", sys.stdout)
726 if fp is None:
727 return
728
729 def write(data):
730 if not isinstance(data, basestring):
731 data = str(data)
732 # If the file has an encoding, encode unicode with it.
733 if (isinstance(fp, file) and
734 isinstance(data, unicode) and
735 fp.encoding is not None):
736 errors = getattr(fp, "errors", None)
737 if errors is None:
738 errors = "strict"
739 data = data.encode(fp.encoding, errors)
740 fp.write(data)
741 want_unicode = False
742 sep = kwargs.pop("sep", None)
743 if sep is not None:
744 if isinstance(sep, unicode):
745 want_unicode = True
746 elif not isinstance(sep, str):
747 raise TypeError("sep must be None or a string")
748 end = kwargs.pop("end", None)
749 if end is not None:
750 if isinstance(end, unicode):
751 want_unicode = True
752 elif not isinstance(end, str):
753 raise TypeError("end must be None or a string")
754 if kwargs:
755 raise TypeError("invalid keyword arguments to print()")
756 if not want_unicode:
757 for arg in args:
758 if isinstance(arg, unicode):
759 want_unicode = True
760 break
761 if want_unicode:
762 newline = unicode("\n")
763 space = unicode(" ")
764 else:
765 newline = "\n"
766 space = " "
767 if sep is None:
768 sep = space
769 if end is None:
770 end = newline
771 for i, arg in enumerate(args):
772 if i:
773 write(sep)
774 write(arg)
775 write(end)
776 if sys.version_info[:2] < (3, 3):
777 _print = print_
778
779 def print_(*args, **kwargs):
780 fp = kwargs.get("file", sys.stdout)
781 flush = kwargs.pop("flush", False)
782 _print(*args, **kwargs)
783 if flush and fp is not None:
784 fp.flush()
785
786 _add_doc(reraise, """Reraise an exception.""")
787
788 if sys.version_info[0:2] < (3, 4):
789 def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
790 updated=functools.WRAPPER_UPDATES):
791 def wrapper(f):
792 f = functools.wraps(wrapped, assigned, updated)(f)
793 f.__wrapped__ = wrapped
794 return f
795 return wrapper
796 else:
797 wraps = functools.wraps
798
799
800 def with_metaclass(meta, *bases):
801 """Create a base class with a metaclass."""
802 # This requires a bit of explanation: the basic idea is to make a dummy
803 # metaclass for one level of class instantiation that replaces itself with
804 # the actual metaclass.
805 class metaclass(meta):
806
807 def __new__(cls, name, this_bases, d):
808 return meta(name, bases, d)
809 return type.__new__(metaclass, 'temporary_class', (), {})
810
811
812 def add_metaclass(metaclass):
813 """Class decorator for creating a class with a metaclass."""
814 def wrapper(cls):
815 orig_vars = cls.__dict__.copy()
816 slots = orig_vars.get('__slots__')
817 if slots is not None:
818 if isinstance(slots, str):
819 slots = [slots]
820 for slots_var in slots:
821 orig_vars.pop(slots_var)
822 orig_vars.pop('__dict__', None)
823 orig_vars.pop('__weakref__', None)
824 return metaclass(cls.__name__, cls.__bases__, orig_vars)
825 return wrapper
826
827
828 def python_2_unicode_compatible(klass):
829 """
830 A decorator that defines __unicode__ and __str__ methods under Python 2.
831 Under Python 3 it does nothing.
832
833 To support Python 2 and 3 with a single code base, define a __str__ method
834 returning text and apply this decorator to the class.
835 """
836 if PY2:
837 if '__str__' not in klass.__dict__:
838 raise ValueError("@python_2_unicode_compatible cannot be applied "
839 "to %s because it doesn't define __str__()." %
840 klass.__name__)
841 klass.__unicode__ = klass.__str__
842 klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
843 return klass
844
845
846 # Complete the moves implementation.
847 # This code is at the end of this module to speed up module loading.
848 # Turn this module into a package.
849 __path__ = [] # required for PEP 302 and PEP 451
850 __package__ = __name__ # see PEP 366 @ReservedAssignment
851 if globals().get("__spec__") is not None:
852 __spec__.submodule_search_locations = [] # PEP 451 @UndefinedVariable
853 # Remove other six meta path importers, since they cause problems. This can
854 # happen if six is removed from sys.modules and then reloaded. (Setuptools does
855 # this for some reason.)
856 if sys.meta_path:
857 for i, importer in enumerate(sys.meta_path):
858 # Here's some real nastiness: Another "instance" of the six module might
859 # be floating around. Therefore, we can't use isinstance() to check for
860 # the six meta path importer, since the other six instance will have
861 # inserted an importer with different class.
862 if (type(importer).__name__ == "_SixMetaPathImporter" and
863 importer.name == __name__):
864 del sys.meta_path[i]
865 break
866 del i, importer
867 # Finally, add the importer to the meta path import hook.
868 sys.meta_path.append(_importer)