if __name__ == '__main__':
    import sys
    import os
    sys.path.append(os.path.dirname(os.path.dirname(__file__)))

    from not_my_code import other

    def callback2():
        raise RuntimeError('TEST SUCEEDED!')

    def callback1():
        other.call_me_back2(callback2)

    other.call_me_back1(callback1)  # break here