Testing an algorithm (I don't know its name).

toggler.py

#!/usr/bin/env python3

""" Testing an algorithm (I don't know its name). """

def tests():
    """ Tests. """

    if [0, 0, 0, 1, 1, 1, 0, 1] == list(produced([0, 0, 0, 1, 0, 0, 1, 1])):
        print('test success')

    else:
        print('test failure')


def produced(toggler):

    """ Transformation function. """

    if len(toggler) > 0:
        ret = toggler[0]
        yield ret

    for cur in toggler[1:]:

        # 0:same, 1:different

        if cur == 0:
            ret = ret

        elif cur == 1:
            ret = 1 - ret

        yield ret