No module named builtins

[byuns9334]

I'm executing 'python train.py --manifest train:train-clean-100/train100manifest.csv --manifest val:dev-clean/devcleanmanifest.csv -e 1 -z 128' on 'neon' directory, but i constantly get the same error: 'No module named builtins'.
I've already tried:
sudo pip install future
sudo pip install futures
but I still get the same error.
How should I solve this?
(I didn't settle virtualenv neon, but does it matter?)

[tyler-nervana]

It should work fine outside of a virtualenv. Does pip show future return anything? Perhaps you could try sudo pip install --upgrade future. Could you also post a full stacktrace when you see the error?