python-patterns/chaining_method.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

class Person(object):

    def __init__(self, name, action):
        self.name = name
        self.action = action

    def do_action(self):
        print self.name, self.action.name,
        return self.action

class Action(object):

    def __init__(self, name):
        self.name = name

    def amount(self, val):
        print val,
        return self

    def stop(self):
        print 'then stop'

if __name__ == '__main__':

    move = Action('move')
    person = Person('Jack', move)
    person.do_action().amount('5m').stop()

#===== Output =====
# Jack move 5m then stop