third_party/stdlib/functools.py
def cmp_to_key(mycmp):
    """Convert a cmp= function into a key= function"""
    class K(object):
        __slots__ = ['obj']
        def __init__(self, obj, *args):
            self.obj = obj
        def __lt__(self, other):
            return mycmp(self.obj, other.obj) < 0
        def __gt__(self, other):
            return mycmp(self.obj, other.obj) > 0
        def __eq__(self, other):
            return mycmp(self.obj, other.obj) == 0
        def __le__(self, other):
            return mycmp(self.obj, other.obj) <= 0
        def __ge__(self, other):
            return mycmp(self.obj, other.obj) >= 0
        def __ne__(self, other):
            return mycmp(self.obj, other.obj) != 0
        def __hash__(self):
            raise TypeError('hash not implemented')
    return K
def cmp_to_key(mycmp):
    """Convert a cmp= function into a key= function"""
    class K(object):
        __slots__ = ['obj']
        def __init__(self, obj, *args):
            self.obj = obj
        def __lt__(self, other):
            return mycmp(self.obj, other.obj) < 0
        def __gt__(self, other):
            return mycmp(self.obj, other.obj) > 0
        def __eq__(self, other):
            return mycmp(self.obj, other.obj) == 0
        def __le__(self, other):
            return mycmp(self.obj, other.obj) <= 0
        def __ge__(self, other):
            return mycmp(self.obj, other.obj) >= 0
        def __ne__(self, other):
            return mycmp(self.obj, other.obj) != 0
        def __hash__(self):
            raise TypeError('hash not implemented')
    return K
def cmp_to_key ( mycmp ) : class K ( object ) : __slots__ = [ 'obj' ] def __init__ ( self , obj , * args ) : self . obj = obj def __lt__ ( self , other ) : return mycmp ( self . obj , other . obj ) < 0 def __gt__ ( self , other ) : return mycmp ( self . obj , other . obj ) > 0 def __eq__ ( self , other ) : return mycmp ( self . obj , other . obj ) == 0 def __le__ ( self , other ) : return mycmp ( self . obj , other . obj ) <= 0 def __ge__ ( self , other ) : return mycmp ( self . obj , other . obj ) >= 0 def __ne__ ( self , other ) : return mycmp ( self . obj , other . obj ) != 0 def __hash__ ( self ) : raise TypeError ( 'hash not implemented' ) return K
Convert a cmp= function into a key= function
Convert a cmp = function into a key = function