[fork] currying in python (from http://pydroid.posterous.com/nextpy-currying)

gistfile1.py

"""
See also:
 - http://code.activestate.com/recipes/52549/#c6
 - http://en.wikipedia.org/wiki/Currying#Contrast_with_partial_function_application
"""
class curry:
    def __init__(self, fun):
        import inspect

        self.fun = fun
        self.__args = []

        self.min_arg_count = len(inspect.getargspec(fun)[0])

    def __call__(self, one):
        args = self.__args + [one, ]

        # enough args, call fun
        if len(args) >= self.min_arg_count:
            return self.fun(*args)

        # not enough args, return a new curried instance
        ret = curry(self.fun)
        ret.__args = args
        return ret

def myMax(x,y):
    return x if x > y else y

def third_of(a, b, c):
    return c


if __name__ == "__main__":
    max_of_4 = curry(myMax)(4)
    print max_of_4(2) # max(4,2) = 4
    print max_of_4(6) # max(4,6) = 6

    print curry(third_of)(1)
    print curry(third_of)(1)(2)
    print curry(third_of)(1)(2)(3)