`implements ` doesn't work with py3

[aodag]

from zope.interface import Interface, implements

class ISample(Interface):
    """ sample interface """

class Spam(object):
    implements(ISample)

if ISample.implementedBy(Spam):
    print("OK")
else:
    print("NG")

running with python2.7 displays "OK", but displays "NG" with python3.2.

And `Spam` class has `__implements_advice_data__`.
Is that correct?

[aodag (aodag)]

dups of https://bugs.launchpad.net/zope.interface/+bug/911851

[Tres Seaver (tseaver)]

See the duplicate issue:

 https://bugs.launchpad.net/zope.interface/+bug/911851