mulpyplexer

Mulpyplexer is a piece of code that can multiplex interactions with lists of python objects. It's easier to show you:

import mulpyplexer

class A:
    def __init__(self, i):
        self.i = i

    def add(self, j):
        return A(self.i + (j.i if isinstance(j, A) else j))

    def sub(self, j):
        return A(self.i - (j.i if isinstance(j, A) else j))

    def __repr__(self):
        return "<A %d>" % self.i

    def str(self):
        return str(self.i)

    def __eq__(self, o):
        return self.i == o.i

one = mulpyplexer.MP([ A(10), A(20), A(30) ])

two = one.add(5)
assert two.mp_items == [ A(15), A(25), A(35) ]

three = two.sub(10)
assert three.mp_items == [ A(5), A(15), A(25) ]

four = three.add(one)
assert four.mp_items == [ A(15), A(35), A(55) ]

five = four.str()
assert five.mp_items == [ "15", "35", "55" ]

six = four.i
assert six.mp_items == [ 15, 35, 55 ]