Clean Code - Ch. 6 The Law of Demeter

law-of-demeter.py

class C:
    def __init__(self):
        self.foo = Foo()

    def f(self, arg_foo):
        # call method of C
        self.other_f()

        # call method of an object created by f
        local_foo = Foo()
        local_foo.bar()

        # call method of an object passed as an argument to f
        arg_foo.bar()

        # call method of an object held in an instance vairable of C
        self.foo.bar()

    def other_f(self):
        pass

class Foo:
    def bar(self):
        pass