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

[Larry Martell]

On Thu, Aug 8, 2019 at 11:30 AM Peter Otten <__peter__ at web.de> wrote:
>
> Larry Martell wrote:
>
> > I have some code that is using the pyke package
> > (https://sourceforge.net/projects/pyke/). 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 =
> > knowledge_engine.engine((rule_base_source_folder,
> > (compiled_rule_base_folder)))
> > 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'
>
> In Python 3 the map() builtin is "lazy", so you can use that instead.
>
> > I tried converting presentationGen to a list but get the same error.
> >
> > How can I make this work in py3?
>
> The problem is in the project rather than in your code -- you have to port
> pyke to Python 3 before you can use it. If you want to go that route you may
> give the 2to3 tool a try:
>
> $ cat demo.py
> import itertools
>
> for i in itertools.imap(abs, [-1, 1]):
>     print i
> $ 2to3 -w demo.py
> [...]
> $ cat demo.py
> import itertools
>
> for i in map(abs, [-1, 1]):
>     print(i)
> $

Pyke has been ported to py3. Here is the code that returns the data I
am trying to process:

return map(self.doctor_answer, it)

I don't see anything calling imap.