@staticmethod
def enable_spy(spy_cls):
    'Sets the Spy to use the given class\n        and calls its initializer.\n        '
    Spy._actv_cls = spy_cls
    spy_cls.init()
Sets the Spy to use the given class
and calls its initializer.
@staticmethod
def enable_spy(spy_cls):
    'Sets the Spy to use the given class\n        and calls its initializer.\n        '
    Spy._actv_cls = spy_cls
    spy_cls.init()