blah

gistfile1.txt

def gen():
    print 'foo'



class Test(object):
    @classmethod
    def _uuid(cls):
        return gen()

    @classmethod
    def foo(cls):
        if cls._uuid is not None:
            print cls._uuid()

class B(Test):
    _uuid = None

t=Test()
b=B()

t.foo()
b.foo()