human
Complete this python program:
def comparable(klass):
assistant
#Here is the Python program you requested.

    """Class decorator that ensures support for the special C{__cmp__} method.
    On Python 2 this does nothing.
    On Python 3, C{__eq__}, C{__lt__}, etc. methods are added to the class,
    relying on C{__cmp__} to implement their comparisons.
    """
    if (not _PY3):
        return klass
    def __eq__(self, other):
        c = self.__cmp__(other)
        if (c is NotImplemented):
            return c
        return (c == 0)
    def __ne__(self, other):
        c = self.__cmp__(other)
        if (c is NotImplemented):
            return c
        return (c != 0)
    def __lt__(self, other):
        c = self.__cmp__(other)
        if (c is NotImplemented):
            return c
        return (c < 0)
    def __le__(self, other):
        c = self.__cmp__(other)
        if (c is NotImplemented):
            return c
        return (c <= 0)
    def __gt__(self, other):
        c = self.__cmp__(other)
        if (c is NotImplemented):
            return c
        return (c > 0)
    def __ge__(self, other):
        c = self.__cmp__(other)
        if (c is NotImplemented):
            return c
        return (c >= 0)
    klass.__lt__ = __lt__
    klass.__gt__ = __gt__
    klass.__le__ = __le__
    klass.__ge__ = __ge__
    klass.__eq__ = __eq__
    klass.__ne__ = __ne__
    return klass