is it necessary to install cupy..?

[himanshugiriraj]

dear zhang,
i am trying to reimplement your code on my cpu and as per your instructions i need cupy environment but it recomended for CUDA device only. and when i am trying to run it without cupy following errors occurs
ImportError: cannot import name '_gradient' from 'eco.features'
i am using windows..
and what modifications i should make in comment line 6 of features..
can your please elaborate them..

[agreatbigworld]

same problem, have you solved it ? could you share your solutions?