Lifting "&" to apply to functions

lift_and.py

class CombinableFunction(object):
    def __init__(self, function):
        self.function = function

    def __call__(self, *args):
        return self.function(*args)

    def __or__(self, other):
        def new_function(*args):
            return self.function(*args) | other(*args)
        return CombinableFunction(new_function)

    def __and__(self, other):
        def new_function(*args):
            return self.function(*args) & other(*args)
        return CombinableFunction(new_function)