Modelo para trabalhar com fluxos e transições.

transition.py

# -*- coding: utf-8 -*-

import inspect


class TransitionObject(object):
    """
        TransitionObject:

        Uma classe para ajudar nas passagens de transições em fluxos.

    """

    def __init__(self):
        self.state = 0

    def transition_1(self):
        self.state = 1

    def transition_2(self):
        self.state = 2

    def transition_3(self):
        self.state = 3

    def reverse_transition_1(self):
        self.state = 0

    def reverse_transition_2(self):
        self.state = 0

    def reverse_transition_22(self):
        self.state = 0

    def get_methods(self):
        methods = inspect.getmembers(self, predicate=inspect.ismethod)
        return map(lambda x: x[0], methods)

    def list_transition_methods(self):
        methods = self.get_methods()
        return filter(lambda x: x.startswith('transition'), methods)

    def list_reversible_transitions(self):
        methods = self.get_methods()
        return filter(lambda x: x.startswith('reverse_transition'), methods)

    def check_reversibility(self):
        transitions = self.list_transition_methods()
        reversions = self.list_reversible_transitions()
        tra_rev = []
        for tra in transitions:
            try:
                rev = next(rev for rev in reversions if tra in rev)
            except StopIteration:
                rev = None
            tra_rev.append((tra, rev, True if rev else False))
        return tra_rev

if __name__ == '__main__':
    tra = TransitionObject()
    print tra.check_reversibility()