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Unified Diff: venv/Lib/site-packages/django/utils/six.py

Issue 554060043: testMe
Patch Set: Created 2 years, 10 months ago
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Index: venv/Lib/site-packages/django/utils/six.py
===================================================================
new file mode 100644
--- /dev/null
+++ b/venv/Lib/site-packages/django/utils/six.py
@@ -0,0 +1,884 @@
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+# Copyright (c) 2010-2015 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from __future__ import absolute_import
+
+import functools
+import itertools
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.10.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+PY34 = sys.version_info[0:2] >= (3, 4)
+
+if PY3:
+ string_types = str,
+ integer_types = int,
+ class_types = type,
+ text_type = str
+ binary_type = bytes
+
+ MAXSIZE = sys.maxsize
+else:
+ string_types = basestring,
+ integer_types = (int, long)
+ class_types = (type, types.ClassType)
+ text_type = unicode
+ binary_type = str
+
+ if sys.platform.startswith("java"):
+ # Jython always uses 32 bits.
+ MAXSIZE = int((1 << 31) - 1)
+ else:
+ # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+ class X(object):
+
+ def __len__(self):
+ return 1 << 31
+ try:
+ len(X())
+ except OverflowError:
+ # 32-bit
+ MAXSIZE = int((1 << 31) - 1)
+ else:
+ # 64-bit
+ MAXSIZE = int((1 << 63) - 1)
+ del X
+
+
+def _add_doc(func, doc):
+ """Add documentation to a function."""
+ func.__doc__ = doc
+
+
+def _import_module(name):
+ """Import module, returning the module after the last dot."""
+ __import__(name)
+ return sys.modules[name]
+
+
+class _LazyDescr(object):
+
+ def __init__(self, name):
+ self.name = name
+
+ def __get__(self, obj, tp):
+ result = self._resolve()
+ setattr(obj, self.name, result) # Invokes __set__.
+ try:
+ # This is a bit ugly, but it avoids running this again by
+ # removing this descriptor.
+ delattr(obj.__class__, self.name)
+ except AttributeError:
+ pass
+ return result
+
+
+class MovedModule(_LazyDescr):
+
+ def __init__(self, name, old, new=None):
+ super(MovedModule, self).__init__(name)
+ if PY3:
+ if new is None:
+ new = name
+ self.mod = new
+ else:
+ self.mod = old
+
+ def _resolve(self):
+ return _import_module(self.mod)
+
+ def __getattr__(self, attr):
+ _module = self._resolve()
+ value = getattr(_module, attr)
+ setattr(self, attr, value)
+ return value
+
+
+class _LazyModule(types.ModuleType):
+
+ def __init__(self, name):
+ super(_LazyModule, self).__init__(name)
+ self.__doc__ = self.__class__.__doc__
+
+ def __dir__(self):
+ attrs = ["__doc__", "__name__"]
+ attrs += [attr.name for attr in self._moved_attributes]
+ return attrs
+
+ # Subclasses should override this
+ _moved_attributes = []
+
+
+class MovedAttribute(_LazyDescr):
+
+ def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+ super(MovedAttribute, self).__init__(name)
+ if PY3:
+ if new_mod is None:
+ new_mod = name
+ self.mod = new_mod
+ if new_attr is None:
+ if old_attr is None:
+ new_attr = name
+ else:
+ new_attr = old_attr
+ self.attr = new_attr
+ else:
+ self.mod = old_mod
+ if old_attr is None:
+ old_attr = name
+ self.attr = old_attr
+
+ def _resolve(self):
+ module = _import_module(self.mod)
+ return getattr(module, self.attr)
+
+
+class _SixMetaPathImporter(object):
+
+ """
+ A meta path importer to import six.moves and its submodules.
+
+ This class implements a PEP302 finder and loader. It should be compatible
+ with Python 2.5 and all existing versions of Python3
+ """
+
+ def __init__(self, six_module_name):
+ self.name = six_module_name
+ self.known_modules = {}
+
+ def _add_module(self, mod, *fullnames):
+ for fullname in fullnames:
+ self.known_modules[self.name + "." + fullname] = mod
+
+ def _get_module(self, fullname):
+ return self.known_modules[self.name + "." + fullname]
+
+ def find_module(self, fullname, path=None):
+ if fullname in self.known_modules:
+ return self
+ return None
+
+ def __get_module(self, fullname):
+ try:
+ return self.known_modules[fullname]
+ except KeyError:
+ raise ImportError("This loader does not know module " + fullname)
+
+ def load_module(self, fullname):
+ try:
+ # in case of a reload
+ return sys.modules[fullname]
+ except KeyError:
+ pass
+ mod = self.__get_module(fullname)
+ if isinstance(mod, MovedModule):
+ mod = mod._resolve()
+ else:
+ mod.__loader__ = self
+ sys.modules[fullname] = mod
+ return mod
+
+ def is_package(self, fullname):
+ """
+ Return true, if the named module is a package.
+
+ We need this method to get correct spec objects with
+ Python 3.4 (see PEP451)
+ """
+ return hasattr(self.__get_module(fullname), "__path__")
+
+ def get_code(self, fullname):
+ """Return None
+
+ Required, if is_package is implemented"""
+ self.__get_module(fullname) # eventually raises ImportError
+ return None
+ get_source = get_code # same as get_code
+
+_importer = _SixMetaPathImporter(__name__)
+
+
+class _MovedItems(_LazyModule):
+
+ """Lazy loading of moved objects"""
+ __path__ = [] # mark as package
+
+
+_moved_attributes = [
+ MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+ MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+ MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
+ MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+ MovedAttribute("intern", "__builtin__", "sys"),
+ MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+ MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
+ MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
+ MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+ MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
+ MovedAttribute("reduce", "__builtin__", "functools"),
+ MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
+ MovedAttribute("StringIO", "StringIO", "io"),
+ MovedAttribute("UserDict", "UserDict", "collections"),
+ MovedAttribute("UserList", "UserList", "collections"),
+ MovedAttribute("UserString", "UserString", "collections"),
+ MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+ MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+ MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
+ MovedModule("builtins", "__builtin__"),
+ MovedModule("configparser", "ConfigParser"),
+ MovedModule("copyreg", "copy_reg"),
+ MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
+ MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread"),
+ MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+ MovedModule("http_cookies", "Cookie", "http.cookies"),
+ MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+ MovedModule("html_parser", "HTMLParser", "html.parser"),
+ MovedModule("http_client", "httplib", "http.client"),
+ MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+ MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
+ MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+ MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+ MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+ MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+ MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+ MovedModule("cPickle", "cPickle", "pickle"),
+ MovedModule("queue", "Queue"),
+ MovedModule("reprlib", "repr"),
+ MovedModule("socketserver", "SocketServer"),
+ MovedModule("_thread", "thread", "_thread"),
+ MovedModule("tkinter", "Tkinter"),
+ MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+ MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+ MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+ MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+ MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+ MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
+ MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+ MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+ MovedModule("tkinter_colorchooser", "tkColorChooser",
+ "tkinter.colorchooser"),
+ MovedModule("tkinter_commondialog", "tkCommonDialog",
+ "tkinter.commondialog"),
+ MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+ MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+ MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+ MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
+ "tkinter.simpledialog"),
+ MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
+ MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
+ MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
+ MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+ MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
+ MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
+]
+# Add windows specific modules.
+if sys.platform == "win32":
+ _moved_attributes += [
+ MovedModule("winreg", "_winreg"),
+ ]
+
+for attr in _moved_attributes:
+ setattr(_MovedItems, attr.name, attr)
+ if isinstance(attr, MovedModule):
+ _importer._add_module(attr, "moves." + attr.name)
+del attr
+
+_MovedItems._moved_attributes = _moved_attributes
+
+moves = _MovedItems(__name__ + ".moves")
+_importer._add_module(moves, "moves")
+
+
+class Module_six_moves_urllib_parse(_LazyModule):
+
+ """Lazy loading of moved objects in six.moves.urllib_parse"""
+
+
+_urllib_parse_moved_attributes = [
+ MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
+ MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
+ MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
+ MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
+ MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
+ MovedAttribute("urljoin", "urlparse", "urllib.parse"),
+ MovedAttribute("urlparse", "urlparse", "urllib.parse"),
+ MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
+ MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
+ MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
+ MovedAttribute("quote", "urllib", "urllib.parse"),
+ MovedAttribute("quote_plus", "urllib", "urllib.parse"),
+ MovedAttribute("unquote", "urllib", "urllib.parse"),
+ MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
+ MovedAttribute("urlencode", "urllib", "urllib.parse"),
+ MovedAttribute("splitquery", "urllib", "urllib.parse"),
+ MovedAttribute("splittag", "urllib", "urllib.parse"),
+ MovedAttribute("splituser", "urllib", "urllib.parse"),
+ MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
+ MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
+ MovedAttribute("uses_params", "urlparse", "urllib.parse"),
+ MovedAttribute("uses_query", "urlparse", "urllib.parse"),
+ MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
+]
+for attr in _urllib_parse_moved_attributes:
+ setattr(Module_six_moves_urllib_parse, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
+ "moves.urllib_parse", "moves.urllib.parse")
+
+
+class Module_six_moves_urllib_error(_LazyModule):
+
+ """Lazy loading of moved objects in six.moves.urllib_error"""
+
+
+_urllib_error_moved_attributes = [
+ MovedAttribute("URLError", "urllib2", "urllib.error"),
+ MovedAttribute("HTTPError", "urllib2", "urllib.error"),
+ MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
+]
+for attr in _urllib_error_moved_attributes:
+ setattr(Module_six_moves_urllib_error, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
+ "moves.urllib_error", "moves.urllib.error")
+
+
+class Module_six_moves_urllib_request(_LazyModule):
+
+ """Lazy loading of moved objects in six.moves.urllib_request"""
+
+
+_urllib_request_moved_attributes = [
+ MovedAttribute("urlopen", "urllib2", "urllib.request"),
+ MovedAttribute("install_opener", "urllib2", "urllib.request"),
+ MovedAttribute("build_opener", "urllib2", "urllib.request"),
+ MovedAttribute("pathname2url", "urllib", "urllib.request"),
+ MovedAttribute("url2pathname", "urllib", "urllib.request"),
+ MovedAttribute("getproxies", "urllib", "urllib.request"),
+ MovedAttribute("Request", "urllib2", "urllib.request"),
+ MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
+ MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
+ MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
+ MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
+ MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
+ MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
+ MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
+ MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
+ MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
+ MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
+ MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
+ MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
+ MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
+ MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
+ MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
+ MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
+ MovedAttribute("FileHandler", "urllib2", "urllib.request"),
+ MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
+ MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
+ MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
+ MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
+ MovedAttribute("urlretrieve", "urllib", "urllib.request"),
+ MovedAttribute("urlcleanup", "urllib", "urllib.request"),
+ MovedAttribute("URLopener", "urllib", "urllib.request"),
+ MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
+ MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
+]
+for attr in _urllib_request_moved_attributes:
+ setattr(Module_six_moves_urllib_request, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
+ "moves.urllib_request", "moves.urllib.request")
+
+
+class Module_six_moves_urllib_response(_LazyModule):
+
+ """Lazy loading of moved objects in six.moves.urllib_response"""
+
+
+_urllib_response_moved_attributes = [
+ MovedAttribute("addbase", "urllib", "urllib.response"),
+ MovedAttribute("addclosehook", "urllib", "urllib.response"),
+ MovedAttribute("addinfo", "urllib", "urllib.response"),
+ MovedAttribute("addinfourl", "urllib", "urllib.response"),
+]
+for attr in _urllib_response_moved_attributes:
+ setattr(Module_six_moves_urllib_response, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
+ "moves.urllib_response", "moves.urllib.response")
+
+
+class Module_six_moves_urllib_robotparser(_LazyModule):
+
+ """Lazy loading of moved objects in six.moves.urllib_robotparser"""
+
+
+_urllib_robotparser_moved_attributes = [
+ MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
+]
+for attr in _urllib_robotparser_moved_attributes:
+ setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
+ "moves.urllib_robotparser", "moves.urllib.robotparser")
+
+
+class Module_six_moves_urllib(types.ModuleType):
+
+ """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
+ __path__ = [] # mark as package
+ parse = _importer._get_module("moves.urllib_parse")
+ error = _importer._get_module("moves.urllib_error")
+ request = _importer._get_module("moves.urllib_request")
+ response = _importer._get_module("moves.urllib_response")
+ robotparser = _importer._get_module("moves.urllib_robotparser")
+
+ def __dir__(self):
+ return ['parse', 'error', 'request', 'response', 'robotparser']
+
+_importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
+ "moves.urllib")
+
+
+def add_move(move):
+ """Add an item to six.moves."""
+ setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+ """Remove item from six.moves."""
+ try:
+ delattr(_MovedItems, name)
+ except AttributeError:
+ try:
+ del moves.__dict__[name]
+ except KeyError:
+ raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+ _meth_func = "__func__"
+ _meth_self = "__self__"
+
+ _func_closure = "__closure__"
+ _func_code = "__code__"
+ _func_defaults = "__defaults__"
+ _func_globals = "__globals__"
+else:
+ _meth_func = "im_func"
+ _meth_self = "im_self"
+
+ _func_closure = "func_closure"
+ _func_code = "func_code"
+ _func_defaults = "func_defaults"
+ _func_globals = "func_globals"
+
+
+try:
+ advance_iterator = next
+except NameError:
+ def advance_iterator(it):
+ return it.next()
+next = advance_iterator
+
+
+try:
+ callable = callable
+except NameError:
+ def callable(obj):
+ return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+ def get_unbound_function(unbound):
+ return unbound
+
+ create_bound_method = types.MethodType
+
+ def create_unbound_method(func, cls):
+ return func
+
+ Iterator = object
+else:
+ def get_unbound_function(unbound):
+ return unbound.im_func
+
+ def create_bound_method(func, obj):
+ return types.MethodType(func, obj, obj.__class__)
+
+ def create_unbound_method(func, cls):
+ return types.MethodType(func, None, cls)
+
+ class Iterator(object):
+
+ def next(self):
+ return type(self).__next__(self)
+
+ callable = callable
+_add_doc(get_unbound_function,
+ """Get the function out of a possibly unbound function""")
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+if PY3:
+ def iterkeys(d, **kw):
+ return iter(d.keys(**kw))
+
+ def itervalues(d, **kw):
+ return iter(d.values(**kw))
+
+ def iteritems(d, **kw):
+ return iter(d.items(**kw))
+
+ def iterlists(d, **kw):
+ return iter(d.lists(**kw))
+
+ viewkeys = operator.methodcaller("keys")
+
+ viewvalues = operator.methodcaller("values")
+
+ viewitems = operator.methodcaller("items")
+else:
+ def iterkeys(d, **kw):
+ return d.iterkeys(**kw)
+
+ def itervalues(d, **kw):
+ return d.itervalues(**kw)
+
+ def iteritems(d, **kw):
+ return d.iteritems(**kw)
+
+ def iterlists(d, **kw):
+ return d.iterlists(**kw)
+
+ viewkeys = operator.methodcaller("viewkeys")
+
+ viewvalues = operator.methodcaller("viewvalues")
+
+ viewitems = operator.methodcaller("viewitems")
+
+_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
+_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
+_add_doc(iteritems,
+ "Return an iterator over the (key, value) pairs of a dictionary.")
+_add_doc(iterlists,
+ "Return an iterator over the (key, [values]) pairs of a dictionary.")
+
+
+if PY3:
+ def b(s):
+ return s.encode("latin-1")
+
+ def u(s):
+ return s
+ unichr = chr
+ import struct
+ int2byte = struct.Struct(">B").pack
+ del struct
+ byte2int = operator.itemgetter(0)
+ indexbytes = operator.getitem
+ iterbytes = iter
+ import io
+ StringIO = io.StringIO
+ BytesIO = io.BytesIO
+ _assertCountEqual = "assertCountEqual"
+ if sys.version_info[1] <= 1:
+ _assertRaisesRegex = "assertRaisesRegexp"
+ _assertRegex = "assertRegexpMatches"
+ else:
+ _assertRaisesRegex = "assertRaisesRegex"
+ _assertRegex = "assertRegex"
+else:
+ def b(s):
+ return s
+ # Workaround for standalone backslash
+
+ def u(s):
+ return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
+ unichr = unichr
+ int2byte = chr
+
+ def byte2int(bs):
+ return ord(bs[0])
+
+ def indexbytes(buf, i):
+ return ord(buf[i])
+ iterbytes = functools.partial(itertools.imap, ord)
+ import StringIO
+ StringIO = BytesIO = StringIO.StringIO
+ _assertCountEqual = "assertItemsEqual"
+ _assertRaisesRegex = "assertRaisesRegexp"
+ _assertRegex = "assertRegexpMatches"
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+def assertCountEqual(self, *args, **kwargs):
+ return getattr(self, _assertCountEqual)(*args, **kwargs)
+
+
+def assertRaisesRegex(self, *args, **kwargs):
+ return getattr(self, _assertRaisesRegex)(*args, **kwargs)
+
+
+def assertRegex(self, *args, **kwargs):
+ return getattr(self, _assertRegex)(*args, **kwargs)
+
+
+if PY3:
+ exec_ = getattr(moves.builtins, "exec")
+
+ def reraise(tp, value, tb=None):
+ if value is None:
+ value = tp()
+ if value.__traceback__ is not tb:
+ raise value.with_traceback(tb)
+ raise value
+
+else:
+ def exec_(_code_, _globs_=None, _locs_=None):
+ """Execute code in a namespace."""
+ if _globs_ is None:
+ frame = sys._getframe(1)
+ _globs_ = frame.f_globals
+ if _locs_ is None:
+ _locs_ = frame.f_locals
+ del frame
+ elif _locs_ is None:
+ _locs_ = _globs_
+ exec("""exec _code_ in _globs_, _locs_""")
+
+ exec_("""def reraise(tp, value, tb=None):
+ raise tp, value, tb
+""")
+
+
+if sys.version_info[:2] == (3, 2):
+ exec_("""def raise_from(value, from_value):
+ if from_value is None:
+ raise value
+ raise value from from_value
+""")
+elif sys.version_info[:2] > (3, 2):
+ exec_("""def raise_from(value, from_value):
+ raise value from from_value
+""")
+else:
+ def raise_from(value, from_value):
+ raise value
+
+
+print_ = getattr(moves.builtins, "print", None)
+if print_ is None:
+ def print_(*args, **kwargs):
+ """The new-style print function for Python 2.4 and 2.5."""
+ fp = kwargs.pop("file", sys.stdout)
+ if fp is None:
+ return
+
+ def write(data):
+ if not isinstance(data, basestring):
+ data = str(data)
+ # If the file has an encoding, encode unicode with it.
+ if (isinstance(fp, file) and
+ isinstance(data, unicode) and
+ fp.encoding is not None):
+ errors = getattr(fp, "errors", None)
+ if errors is None:
+ errors = "strict"
+ data = data.encode(fp.encoding, errors)
+ fp.write(data)
+ want_unicode = False
+ sep = kwargs.pop("sep", None)
+ if sep is not None:
+ if isinstance(sep, unicode):
+ want_unicode = True
+ elif not isinstance(sep, str):
+ raise TypeError("sep must be None or a string")
+ end = kwargs.pop("end", None)
+ if end is not None:
+ if isinstance(end, unicode):
+ want_unicode = True
+ elif not isinstance(end, str):
+ raise TypeError("end must be None or a string")
+ if kwargs:
+ raise TypeError("invalid keyword arguments to print()")
+ if not want_unicode:
+ for arg in args:
+ if isinstance(arg, unicode):
+ want_unicode = True
+ break
+ if want_unicode:
+ newline = unicode("\n")
+ space = unicode(" ")
+ else:
+ newline = "\n"
+ space = " "
+ if sep is None:
+ sep = space
+ if end is None:
+ end = newline
+ for i, arg in enumerate(args):
+ if i:
+ write(sep)
+ write(arg)
+ write(end)
+if sys.version_info[:2] < (3, 3):
+ _print = print_
+
+ def print_(*args, **kwargs):
+ fp = kwargs.get("file", sys.stdout)
+ flush = kwargs.pop("flush", False)
+ _print(*args, **kwargs)
+ if flush and fp is not None:
+ fp.flush()
+
+_add_doc(reraise, """Reraise an exception.""")
+
+if sys.version_info[0:2] < (3, 4):
+ def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
+ updated=functools.WRAPPER_UPDATES):
+ def wrapper(f):
+ f = functools.wraps(wrapped, assigned, updated)(f)
+ f.__wrapped__ = wrapped
+ return f
+ return wrapper
+else:
+ wraps = functools.wraps
+
+
+def with_metaclass(meta, *bases):
+ """Create a base class with a metaclass."""
+ # This requires a bit of explanation: the basic idea is to make a dummy
+ # metaclass for one level of class instantiation that replaces itself with
+ # the actual metaclass.
+ class metaclass(meta):
+
+ def __new__(cls, name, this_bases, d):
+ return meta(name, bases, d)
+ return type.__new__(metaclass, 'temporary_class', (), {})
+
+
+def add_metaclass(metaclass):
+ """Class decorator for creating a class with a metaclass."""
+ def wrapper(cls):
+ orig_vars = cls.__dict__.copy()
+ slots = orig_vars.get('__slots__')
+ if slots is not None:
+ if isinstance(slots, str):
+ slots = [slots]
+ for slots_var in slots:
+ orig_vars.pop(slots_var)
+ orig_vars.pop('__dict__', None)
+ orig_vars.pop('__weakref__', None)
+ return metaclass(cls.__name__, cls.__bases__, orig_vars)
+ return wrapper
+
+
+def python_2_unicode_compatible(klass):
+ """
+ A decorator that defines __unicode__ and __str__ methods under Python 2.
+ Under Python 3 it does nothing.
+
+ To support Python 2 and 3 with a single code base, define a __str__ method
+ returning text and apply this decorator to the class.
+ """
+ if PY2:
+ if '__str__' not in klass.__dict__:
+ raise ValueError("@python_2_unicode_compatible cannot be applied "
+ "to %s because it doesn't define __str__()." %
+ klass.__name__)
+ klass.__unicode__ = klass.__str__
+ klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
+ return klass
+
+
+# Complete the moves implementation.
+# This code is at the end of this module to speed up module loading.
+# Turn this module into a package.
+__path__ = [] # required for PEP 302 and PEP 451
+__package__ = __name__ # see PEP 366 @ReservedAssignment
+if globals().get("__spec__") is not None:
+ __spec__.submodule_search_locations = [] # PEP 451 @UndefinedVariable
+# Remove other six meta path importers, since they cause problems. This can
+# happen if six is removed from sys.modules and then reloaded. (Setuptools does
+# this for some reason.)
+if sys.meta_path:
+ for i, importer in enumerate(sys.meta_path):
+ # Here's some real nastiness: Another "instance" of the six module might
+ # be floating around. Therefore, we can't use isinstance() to check for
+ # the six meta path importer, since the other six instance will have
+ # inserted an importer with different class.
+ if (type(importer).__name__ == "_SixMetaPathImporter" and
+ importer.name == __name__):
+ del sys.meta_path[i]
+ break
+ del i, importer
+# Finally, add the importer to the meta path import hook.
+sys.meta_path.append(_importer)
+
+
+### Additional customizations for Django ###
+
+if PY3:
+ memoryview = memoryview
+ buffer_types = (bytes, bytearray, memoryview)
+else:
+ # memoryview and buffer are not strictly equivalent, but should be fine for
+ # django core usage (mainly BinaryField). However, Jython doesn't support
+ # buffer (see http://bugs.jython.org/issue1521), so we have to be careful.
+ if sys.platform.startswith('java'):
+ memoryview = memoryview
+ else:
+ memoryview = buffer
+ buffer_types = (bytearray, memoryview)
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