Ruud
13 years ago
11 changed files with 718 additions and 301 deletions
@ -1,9 +1,10 @@ |
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# -*- coding: utf-8 -*- |
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""" |
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Copyright (c) 2003-2010 Gustavo Niemeyer <gustavo@niemeyer.net> |
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This module offers extensions to the standard python 2.3+ |
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This module offers extensions to the standard Python |
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datetime module. |
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""" |
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__author__ = "Gustavo Niemeyer <gustavo@niemeyer.net>" |
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__license__ = "PSF License" |
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__version__ = "1.5" |
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__author__ = "Tomi Pieviläinen <tomi.pievilainen@iki.fi>" |
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__license__ = "Simplified BSD" |
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__version__ = "2.1" |
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@ -0,0 +1,366 @@ |
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"""Utilities for writing code that runs on Python 2 and 3""" |
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|
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import operator |
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import sys |
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import types |
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|
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__author__ = "Benjamin Peterson <benjamin@python.org>" |
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__version__ = "1.2.0" |
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# True if we are running on Python 3. |
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PY3 = sys.version_info[0] == 3 |
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if PY3: |
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string_types = str, |
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integer_types = int, |
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class_types = type, |
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text_type = str |
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binary_type = bytes |
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|
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MAXSIZE = sys.maxsize |
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else: |
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string_types = basestring, |
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integer_types = (int, long) |
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class_types = (type, types.ClassType) |
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text_type = unicode |
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binary_type = str |
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|
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if sys.platform == "java": |
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# Jython always uses 32 bits. |
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MAXSIZE = int((1 << 31) - 1) |
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else: |
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# It's possible to have sizeof(long) != sizeof(Py_ssize_t). |
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class X(object): |
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def __len__(self): |
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return 1 << 31 |
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try: |
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len(X()) |
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except OverflowError: |
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# 32-bit |
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MAXSIZE = int((1 << 31) - 1) |
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else: |
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# 64-bit |
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MAXSIZE = int((1 << 63) - 1) |
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del X |
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|
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def _add_doc(func, doc): |
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"""Add documentation to a function.""" |
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func.__doc__ = doc |
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def _import_module(name): |
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"""Import module, returning the module after the last dot.""" |
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__import__(name) |
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return sys.modules[name] |
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class _LazyDescr(object): |
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def __init__(self, name): |
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self.name = name |
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def __get__(self, obj, tp): |
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result = self._resolve() |
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setattr(obj, self.name, result) |
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# This is a bit ugly, but it avoids running this again. |
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delattr(tp, self.name) |
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return result |
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class MovedModule(_LazyDescr): |
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def __init__(self, name, old, new=None): |
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super(MovedModule, self).__init__(name) |
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if PY3: |
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if new is None: |
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new = name |
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self.mod = new |
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else: |
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self.mod = old |
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def _resolve(self): |
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return _import_module(self.mod) |
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class MovedAttribute(_LazyDescr): |
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def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None): |
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super(MovedAttribute, self).__init__(name) |
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if PY3: |
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if new_mod is None: |
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new_mod = name |
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self.mod = new_mod |
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if new_attr is None: |
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if old_attr is None: |
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new_attr = name |
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else: |
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new_attr = old_attr |
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self.attr = new_attr |
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else: |
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self.mod = old_mod |
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if old_attr is None: |
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old_attr = name |
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self.attr = old_attr |
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def _resolve(self): |
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module = _import_module(self.mod) |
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return getattr(module, self.attr) |
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class _MovedItems(types.ModuleType): |
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"""Lazy loading of moved objects""" |
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_moved_attributes = [ |
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MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"), |
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MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"), |
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MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"), |
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MovedAttribute("map", "itertools", "builtins", "imap", "map"), |
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MovedAttribute("reload_module", "__builtin__", "imp", "reload"), |
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MovedAttribute("reduce", "__builtin__", "functools"), |
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MovedAttribute("StringIO", "StringIO", "io"), |
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MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"), |
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MovedAttribute("zip", "itertools", "builtins", "izip", "zip"), |
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MovedModule("builtins", "__builtin__"), |
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MovedModule("configparser", "ConfigParser"), |
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MovedModule("copyreg", "copy_reg"), |
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MovedModule("http_cookiejar", "cookielib", "http.cookiejar"), |
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MovedModule("http_cookies", "Cookie", "http.cookies"), |
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MovedModule("html_entities", "htmlentitydefs", "html.entities"), |
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MovedModule("html_parser", "HTMLParser", "html.parser"), |
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MovedModule("http_client", "httplib", "http.client"), |
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MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"), |
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MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"), |
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MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"), |
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MovedModule("cPickle", "cPickle", "pickle"), |
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MovedModule("queue", "Queue"), |
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MovedModule("reprlib", "repr"), |
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MovedModule("socketserver", "SocketServer"), |
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MovedModule("tkinter", "Tkinter"), |
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MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"), |
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MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"), |
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MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"), |
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MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"), |
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MovedModule("tkinter_tix", "Tix", "tkinter.tix"), |
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MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"), |
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MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"), |
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MovedModule("tkinter_colorchooser", "tkColorChooser", |
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"tkinter.colorchooser"), |
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MovedModule("tkinter_commondialog", "tkCommonDialog", |
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"tkinter.commondialog"), |
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MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"), |
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MovedModule("tkinter_font", "tkFont", "tkinter.font"), |
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MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"), |
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MovedModule("tkinter_tksimpledialog", "tkSimpleDialog", |
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"tkinter.simpledialog"), |
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MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"), |
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MovedModule("winreg", "_winreg"), |
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] |
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for attr in _moved_attributes: |
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setattr(_MovedItems, attr.name, attr) |
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del attr |
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moves = sys.modules["six.moves"] = _MovedItems("moves") |
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def add_move(move): |
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"""Add an item to six.moves.""" |
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setattr(_MovedItems, move.name, move) |
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def remove_move(name): |
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"""Remove item from six.moves.""" |
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try: |
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delattr(_MovedItems, name) |
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except AttributeError: |
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try: |
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del moves.__dict__[name] |
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except KeyError: |
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raise AttributeError("no such move, %r" % (name,)) |
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if PY3: |
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_meth_func = "__func__" |
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_meth_self = "__self__" |
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_func_code = "__code__" |
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_func_defaults = "__defaults__" |
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_iterkeys = "keys" |
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_itervalues = "values" |
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_iteritems = "items" |
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else: |
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_meth_func = "im_func" |
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_meth_self = "im_self" |
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_func_code = "func_code" |
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_func_defaults = "func_defaults" |
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_iterkeys = "iterkeys" |
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_itervalues = "itervalues" |
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_iteritems = "iteritems" |
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try: |
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advance_iterator = next |
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except NameError: |
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def advance_iterator(it): |
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return it.next() |
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next = advance_iterator |
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if PY3: |
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def get_unbound_function(unbound): |
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return unbound |
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Iterator = object |
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def callable(obj): |
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return any("__call__" in klass.__dict__ for klass in type(obj).__mro__) |
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else: |
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def get_unbound_function(unbound): |
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return unbound.im_func |
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class Iterator(object): |
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def next(self): |
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return type(self).__next__(self) |
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callable = callable |
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_add_doc(get_unbound_function, |
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"""Get the function out of a possibly unbound function""") |
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get_method_function = operator.attrgetter(_meth_func) |
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get_method_self = operator.attrgetter(_meth_self) |
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get_function_code = operator.attrgetter(_func_code) |
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get_function_defaults = operator.attrgetter(_func_defaults) |
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def iterkeys(d): |
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"""Return an iterator over the keys of a dictionary.""" |
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return iter(getattr(d, _iterkeys)()) |
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def itervalues(d): |
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"""Return an iterator over the values of a dictionary.""" |
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return iter(getattr(d, _itervalues)()) |
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def iteritems(d): |
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"""Return an iterator over the (key, value) pairs of a dictionary.""" |
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return iter(getattr(d, _iteritems)()) |
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if PY3: |
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def b(s): |
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return s.encode("latin-1") |
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def u(s): |
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return s |
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if sys.version_info[1] <= 1: |
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def int2byte(i): |
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return bytes((i,)) |
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else: |
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# This is about 2x faster than the implementation above on 3.2+ |
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int2byte = operator.methodcaller("to_bytes", 1, "big") |
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import io |
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StringIO = io.StringIO |
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BytesIO = io.BytesIO |
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else: |
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def b(s): |
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return s |
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def u(s): |
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return unicode(s, "unicode_escape") |
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int2byte = chr |
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import StringIO |
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StringIO = BytesIO = StringIO.StringIO |
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_add_doc(b, """Byte literal""") |
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_add_doc(u, """Text literal""") |
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if PY3: |
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import builtins |
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exec_ = getattr(builtins, "exec") |
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def reraise(tp, value, tb=None): |
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if value.__traceback__ is not tb: |
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raise value.with_traceback(tb) |
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raise value |
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print_ = getattr(builtins, "print") |
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del builtins |
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else: |
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def exec_(code, globs=None, locs=None): |
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"""Execute code in a namespace.""" |
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if globs is None: |
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frame = sys._getframe(1) |
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globs = frame.f_globals |
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if locs is None: |
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locs = frame.f_locals |
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del frame |
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elif locs is None: |
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locs = globs |
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exec("""exec code in globs, locs""") |
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exec_("""def reraise(tp, value, tb=None): |
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raise tp, value, tb |
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""") |
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def print_(*args, **kwargs): |
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"""The new-style print function.""" |
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fp = kwargs.pop("file", sys.stdout) |
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if fp is None: |
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return |
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def write(data): |
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if not isinstance(data, basestring): |
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data = str(data) |
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fp.write(data) |
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want_unicode = False |
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sep = kwargs.pop("sep", None) |
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if sep is not None: |
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if isinstance(sep, unicode): |
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want_unicode = True |
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elif not isinstance(sep, str): |
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raise TypeError("sep must be None or a string") |
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end = kwargs.pop("end", None) |
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if end is not None: |
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if isinstance(end, unicode): |
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want_unicode = True |
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elif not isinstance(end, str): |
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raise TypeError("end must be None or a string") |
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if kwargs: |
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raise TypeError("invalid keyword arguments to print()") |
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if not want_unicode: |
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for arg in args: |
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if isinstance(arg, unicode): |
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want_unicode = True |
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break |
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if want_unicode: |
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newline = unicode("\n") |
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space = unicode(" ") |
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else: |
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newline = "\n" |
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space = " " |
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if sep is None: |
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sep = space |
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if end is None: |
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end = newline |
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for i, arg in enumerate(args): |
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if i: |
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write(sep) |
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write(arg) |
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write(end) |
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_add_doc(reraise, """Reraise an exception.""") |
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|
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def with_metaclass(meta, base=object): |
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"""Create a base class with a metaclass.""" |
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return meta("NewBase", (base,), {}) |
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