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AttributeError: module 'itertools' has no attribute 'imap'

I have some code that is using the pyke package
( That project seems fairly
dead, so asking here.

There is a pyke function that returns a context manager with an
iterable map. In py2.7 I did this:

from pyke import knowledge_engine
vasculopathy_engine =
with vasculopathy_engine.prove_goal(...) as presentationGen:
    for vals, plan in presentationGen:

But in py3 that fails with: AttributeError: module 'itertools' has no
attribute 'imap'

I tried converting presentationGen to a list but get the same error.

How can I make this work in py3?