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							584 lines
						
					
					
						
							21 KiB
						
					
					
				
			
		
		
	
	
							584 lines
						
					
					
						
							21 KiB
						
					
					
				"""Utilities for writing code that runs on Python 2 and 3"""
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						|
 | 
						|
# Copyright (c) 2010-2013 Benjamin Peterson
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#
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						|
# Permission is hereby granted, free of charge, to any person obtaining a copy
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						|
# of this software and associated documentation files (the "Software"), to deal
 | 
						|
# in the Software without restriction, including without limitation the rights
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						|
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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						|
# copies of the Software, and to permit persons to whom the Software is
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						|
# furnished to do so, subject to the following conditions:
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						|
#
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						|
# The above copyright notice and this permission notice shall be included in all
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						|
# copies or substantial portions of the Software.
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						|
#
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						|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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						|
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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						|
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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						|
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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						|
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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import operator
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						|
import sys
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import types
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__author__ = "Benjamin Peterson <benjamin@python.org>"
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__version__ = "1.4.1"
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						|
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# Useful for very coarse version differentiation.
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PY2 = sys.version_info[0] == 2
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						|
PY3 = sys.version_info[0] == 3
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						|
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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.startswith("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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						|
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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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						|
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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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						|
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						|
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						|
class MovedModule(_LazyDescr):
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						|
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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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						|
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						|
class _MovedItems(types.ModuleType):
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						|
    """Lazy loading of moved objects"""
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						|
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						|
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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("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
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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("range", "__builtin__", "builtins", "xrange", "range"),
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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("UserString", "UserString", "collections"),
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						|
    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
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						|
    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
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						|
    MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
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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("dbm_gnu", "gdbm", "dbm.gnu"),
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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("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
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						|
    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
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						|
    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
 | 
						|
    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"),
 | 
						|
    MovedModule("reprlib", "repr"),
 | 
						|
    MovedModule("socketserver", "SocketServer"),
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						|
    MovedModule("_thread", "thread", "_thread"),
 | 
						|
    MovedModule("tkinter", "Tkinter"),
 | 
						|
    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"),
 | 
						|
    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
 | 
						|
    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
 | 
						|
    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
 | 
						|
    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
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						|
    MovedModule("tkinter_colorchooser", "tkColorChooser",
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						|
                "tkinter.colorchooser"),
 | 
						|
    MovedModule("tkinter_commondialog", "tkCommonDialog",
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						|
                "tkinter.commondialog"),
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						|
    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
 | 
						|
    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
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						|
    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
 | 
						|
    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
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						|
                "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"),
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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[__name__ + ".moves"] = _MovedItems(__name__ + ".moves")
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						|
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						|
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						|
 | 
						|
class Module_six_moves_urllib_parse(types.ModuleType):
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						|
    """Lazy loading of moved objects in six.moves.urllib_parse"""
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						|
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						|
 | 
						|
_urllib_parse_moved_attributes = [
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						|
    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
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						|
    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"),
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						|
    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
 | 
						|
    MovedAttribute("urlencode", "urllib", "urllib.parse"),
 | 
						|
]
 | 
						|
for attr in _urllib_parse_moved_attributes:
 | 
						|
    setattr(Module_six_moves_urllib_parse, attr.name, attr)
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						|
del attr
 | 
						|
 | 
						|
sys.modules[__name__ + ".moves.urllib_parse"] = Module_six_moves_urllib_parse(__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(types.ModuleType):
 | 
						|
    """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
 | 
						|
 | 
						|
sys.modules[__name__ + ".moves.urllib_error"] = Module_six_moves_urllib_error(__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(types.ModuleType):
 | 
						|
    """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"),
 | 
						|
]
 | 
						|
for attr in _urllib_request_moved_attributes:
 | 
						|
    setattr(Module_six_moves_urllib_request, attr.name, attr)
 | 
						|
del attr
 | 
						|
 | 
						|
sys.modules[__name__ + ".moves.urllib_request"] = Module_six_moves_urllib_request(__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(types.ModuleType):
 | 
						|
    """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
 | 
						|
 | 
						|
sys.modules[__name__ + ".moves.urllib_response"] = Module_six_moves_urllib_response(__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(types.ModuleType):
 | 
						|
    """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
 | 
						|
 | 
						|
sys.modules[__name__ + ".moves.urllib_robotparser"] = Module_six_moves_urllib_robotparser(__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"]
 | 
						|
 | 
						|
 | 
						|
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__"
 | 
						|
 | 
						|
    _iterkeys = "keys"
 | 
						|
    _itervalues = "values"
 | 
						|
    _iteritems = "items"
 | 
						|
    _iterlists = "lists"
 | 
						|
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"
 | 
						|
 | 
						|
    _iterkeys = "iterkeys"
 | 
						|
    _itervalues = "itervalues"
 | 
						|
    _iteritems = "iteritems"
 | 
						|
    _iterlists = "iterlists"
 | 
						|
 | 
						|
 | 
						|
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)
 | 
						|
 | 
						|
 | 
						|
def iterkeys(d, **kw):
 | 
						|
    """Return an iterator over the keys of a dictionary."""
 | 
						|
    return iter(getattr(d, _iterkeys)(**kw))
 | 
						|
 | 
						|
def itervalues(d, **kw):
 | 
						|
    """Return an iterator over the values of a dictionary."""
 | 
						|
    return iter(getattr(d, _itervalues)(**kw))
 | 
						|
 | 
						|
def iteritems(d, **kw):
 | 
						|
    """Return an iterator over the (key, value) pairs of a dictionary."""
 | 
						|
    return iter(getattr(d, _iteritems)(**kw))
 | 
						|
 | 
						|
def iterlists(d, **kw):
 | 
						|
    """Return an iterator over the (key, [values]) pairs of a dictionary."""
 | 
						|
    return iter(getattr(d, _iterlists)(**kw))
 | 
						|
 | 
						|
 | 
						|
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
 | 
						|
    def u(s):
 | 
						|
        return unicode(s, "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)
 | 
						|
        for slots_var in orig_vars.get('__slots__', ()):
 | 
						|
            orig_vars.pop(slots_var)
 | 
						|
        return metaclass(cls.__name__, cls.__bases__, orig_vars)
 | 
						|
    return wrapper |