from __future__ import print_function

import gc
gc.collect()
gc.set_debug(gc.DEBUG_SAVEALL)

def foo():
    class Dude(object):
        @classmethod
        def clsm(a): pass

        @staticmethod
        def sm(): pass

        def im(self): pass

def doit():
    foo()
    gc.collect()
    #expect to see 0 here.
    print(len(gc.garbage))

doit()