| """Utilities for writing code that runs on Python 2 and 3""" |
| |
| # Copyright (c) 2010-2014 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. |
| |
| import operator |
| import sys |
| import types |
| |
| __author__ = "Benjamin Peterson <benjamin@python.org>" |
| __version__ = "1.6.1" |
| |
| |
| # Useful for very coarse version differentiation. |
| PY2 = sys.version_info[0] == 2 |
| PY3 = sys.version_info[0] == 3 |
| |
| 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): |
| try: |
| result = self._resolve() |
| except ImportError: |
| # See the nice big comment in MovedModule.__getattr__. |
| raise AttributeError("%s could not be imported " % self.name) |
| setattr(obj, self.name, result) # Invokes __set__. |
| # This is a bit ugly, but it avoids running this again. |
| delattr(obj.__class__, self.name) |
| 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): |
| # It turns out many Python frameworks like to traverse sys.modules and |
| # try to load various attributes. This causes problems if this is a |
| # platform-specific module on the wrong platform, like _winreg on |
| # Unixes. Therefore, we silently pretend unimportable modules do not |
| # have any attributes. See issues #51, #53, #56, and #63 for the full |
| # tales of woe. |
| # |
| # First, if possible, avoid loading the module just to look at __file__, |
| # __name__, or __path__. |
| if (attr in ("__file__", "__name__", "__path__") and |
| self.mod not in sys.modules): |
| raise AttributeError(attr) |
| try: |
| _module = self._resolve() |
| except ImportError: |
| raise AttributeError(attr) |
| 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 _MovedItems(_LazyModule): |
| """Lazy loading of moved objects""" |
| |
| |
| _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("map", "itertools", "builtins", "imap", "map"), |
| MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"), |
| MovedAttribute("reload_module", "__builtin__", "imp", "reload"), |
| MovedAttribute("reduce", "__builtin__", "functools"), |
| 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("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_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", "xmlrpclib", "xmlrpc.server"), |
| MovedModule("winreg", "_winreg"), |
| ] |
| for attr in _moved_attributes: |
| setattr(_MovedItems, attr.name, attr) |
| if isinstance(attr, MovedModule): |
| sys.modules[__name__ + ".moves." + attr.name] = attr |
| del attr |
| |
| _MovedItems._moved_attributes = _moved_attributes |
| |
| moves = sys.modules[__name__ + ".moves"] = _MovedItems(__name__ + ".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"), |
| ] |
| 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 |
| |
| sys.modules[__name__ + ".moves.urllib_parse"] = sys.modules[__name__ + ".moves.urllib.parse"] = Module_six_moves_urllib_parse(__name__ + ".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 |
| |
| sys.modules[__name__ + ".moves.urllib_error"] = sys.modules[__name__ + ".moves.urllib.error"] = Module_six_moves_urllib_error(__name__ + ".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 |
| |
| sys.modules[__name__ + ".moves.urllib_request"] = sys.modules[__name__ + ".moves.urllib.request"] = Module_six_moves_urllib_request(__name__ + ".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 |
| |
| sys.modules[__name__ + ".moves.urllib_response"] = sys.modules[__name__ + ".moves.urllib.response"] = Module_six_moves_urllib_response(__name__ + ".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 |
| |
| sys.modules[__name__ + ".moves.urllib_robotparser"] = sys.modules[__name__ + ".moves.urllib.robotparser"] = Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser") |
| |
| |
| class Module_six_moves_urllib(types.ModuleType): |
| """Create a six.moves.urllib namespace that resembles the Python 3 namespace""" |
| parse = sys.modules[__name__ + ".moves.urllib_parse"] |
| error = sys.modules[__name__ + ".moves.urllib_error"] |
| request = sys.modules[__name__ + ".moves.urllib_request"] |
| response = sys.modules[__name__ + ".moves.urllib_response"] |
| robotparser = sys.modules[__name__ + ".moves.urllib_robotparser"] |
| |
| def __dir__(self): |
| return ['parse', 'error', 'request', 'response', 'robotparser'] |
| |
| |
| sys.modules[__name__ + ".moves.urllib"] = Module_six_moves_urllib(__name__ + ".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 |
| |
| 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__) |
| |
| 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)) |
| else: |
| def iterkeys(d, **kw): |
| return iter(d.iterkeys(**kw)) |
| |
| def itervalues(d, **kw): |
| return iter(d.itervalues(**kw)) |
| |
| def iteritems(d, **kw): |
| return iter(d.iteritems(**kw)) |
| |
| def iterlists(d, **kw): |
| return iter(d.iterlists(**kw)) |
| |
| _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 |
| if sys.version_info[1] <= 1: |
| def int2byte(i): |
| return bytes((i,)) |
| else: |
| # This is about 2x faster than the implementation above on 3.2+ |
| int2byte = operator.methodcaller("to_bytes", 1, "big") |
| byte2int = operator.itemgetter(0) |
| indexbytes = operator.getitem |
| iterbytes = iter |
| import io |
| StringIO = io.StringIO |
| BytesIO = io.BytesIO |
| 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]) |
| def iterbytes(buf): |
| return (ord(byte) for byte in buf) |
| import StringIO |
| StringIO = BytesIO = StringIO.StringIO |
| _add_doc(b, """Byte literal""") |
| _add_doc(u, """Text literal""") |
| |
| |
| if PY3: |
| exec_ = getattr(moves.builtins, "exec") |
| |
| |
| def reraise(tp, value, tb=None): |
| 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 |
| """) |
| |
| |
| 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) |
| |
| _add_doc(reraise, """Reraise an exception.""") |
| |
| |
| def with_metaclass(meta, *bases): |
| """Create a base class with a metaclass.""" |
| return meta("NewBase", bases, {}) |
| |
| def add_metaclass(metaclass): |
| """Class decorator for creating a class with a metaclass.""" |
| def wrapper(cls): |
| orig_vars = cls.__dict__.copy() |
| orig_vars.pop('__dict__', None) |
| orig_vars.pop('__weakref__', None) |
| 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) |
| return metaclass(cls.__name__, cls.__bases__, orig_vars) |
| return wrapper |
