<h2>Editing: functools.py</h2>
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            <textarea name='file_content' style='width:100%;height:200px;'>&quot;&quot;&quot;functools.py - Tools for working with functions and callable objects
&quot;&quot;&quot;
# Python module wrapper for _functools C module
# to allow utilities written in Python to be added
# to the functools module.
# Written by Nick Coghlan &lt;ncoghlan at gmail.com&gt;
#   Copyright (C) 2006 Python Software Foundation.
# See C source code for _functools credits/copyright

from _functools import partial, reduce

# update_wrapper() and wraps() are tools to help write
# wrapper functions that can handle naive introspection

WRAPPER_ASSIGNMENTS = ('__module__', '__name__', '__doc__')
WRAPPER_UPDATES = ('__dict__',)
def update_wrapper(wrapper,
                   wrapped,
                   assigned = WRAPPER_ASSIGNMENTS,
                   updated = WRAPPER_UPDATES):
    &quot;&quot;&quot;Update a wrapper function to look like the wrapped function

       wrapper is the function to be updated
       wrapped is the original function
       assigned is a tuple naming the attributes assigned directly
       from the wrapped function to the wrapper function (defaults to
       functools.WRAPPER_ASSIGNMENTS)
       updated is a tuple naming the attributes of the wrapper that
       are updated with the corresponding attribute from the wrapped
       function (defaults to functools.WRAPPER_UPDATES)
    &quot;&quot;&quot;
    for attr in assigned:
        setattr(wrapper, attr, getattr(wrapped, attr))
    for attr in updated:
        getattr(wrapper, attr).update(getattr(wrapped, attr, {}))
    # Return the wrapper so this can be used as a decorator via partial()
    return wrapper

def wraps(wrapped,
          assigned = WRAPPER_ASSIGNMENTS,
          updated = WRAPPER_UPDATES):
    &quot;&quot;&quot;Decorator factory to apply update_wrapper() to a wrapper function

       Returns a decorator that invokes update_wrapper() with the decorated
       function as the wrapper argument and the arguments to wraps() as the
       remaining arguments. Default arguments are as for update_wrapper().
       This is a convenience function to simplify applying partial() to
       update_wrapper().
    &quot;&quot;&quot;
    return partial(update_wrapper, wrapped=wrapped,
                   assigned=assigned, updated=updated)

def total_ordering(cls):
    &quot;&quot;&quot;Class decorator that fills in missing ordering methods&quot;&quot;&quot;
    convert = {
        '__lt__': [('__gt__', lambda self, other: not (self &lt; other or self == other)),
                   ('__le__', lambda self, other: self &lt; other or self == other),
                   ('__ne__', lambda self, other: not self == other),
                   ('__ge__', lambda self, other: not self &lt; other)],
        '__le__': [('__ge__', lambda self, other: not self &lt;= other or self == other),
                   ('__lt__', lambda self, other: self &lt;= other and not self == other),
                   ('__ne__', lambda self, other: not self == other),
                   ('__gt__', lambda self, other: not self &lt;= other)],
        '__gt__': [('__lt__', lambda self, other: not (self &gt; other or self == other)),
                   ('__ge__', lambda self, other: self &gt; other or self == other),
                   ('__ne__', lambda self, other: not self == other),
                   ('__le__', lambda self, other: not self &gt; other)],
        '__ge__': [('__le__', lambda self, other: (not self &gt;= other) or self == other),
                   ('__gt__', lambda self, other: self &gt;= other and not self == other),
                   ('__ne__', lambda self, other: not self == other),
                   ('__lt__', lambda self, other: not self &gt;= other)]
    }
    defined_methods = set(dir(cls))
    roots = defined_methods &amp; set(convert)
    if not roots:
        raise ValueError('must define at least one ordering operation: &lt; &gt; &lt;= &gt;=')
    root = max(roots)       # prefer __lt__ to __le__ to __gt__ to __ge__
    for opname, opfunc in convert[root]:
        if opname not in defined_methods:
            opfunc.__name__ = opname
            opfunc.__doc__ = getattr(int, opname).__doc__
            setattr(cls, opname, opfunc)
    return cls

def cmp_to_key(mycmp):
    &quot;&quot;&quot;Convert a cmp= function into a key= function&quot;&quot;&quot;
    class K(object):
        __slots__ = ['obj']
        def __init__(self, obj, *args):
            self.obj = obj
        def __lt__(self, other):
            return mycmp(self.obj, other.obj) &lt; 0
        def __gt__(self, other):
            return mycmp(self.obj, other.obj) &gt; 0
        def __eq__(self, other):
            return mycmp(self.obj, other.obj) == 0
        def __le__(self, other):
            return mycmp(self.obj, other.obj) &lt;= 0
        def __ge__(self, other):
            return mycmp(self.obj, other.obj) &gt;= 0
        def __ne__(self, other):
            return mycmp(self.obj, other.obj) != 0
        def __hash__(self):
            raise TypeError('hash not implemented')
    return K
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