ImportError: cannot import name '_BACKCOMPAT_MAGIC_NUMBER'

Question

Trying to use pip to install just installed another version of python (3.4) get error

ImportError: cannot import name \'_BACKCOMPAT_MAGIC_NUMBER\'

Answer 1

In my case, I was using pipenv, and the fix was to delete the virtualenv and reinstall the dependencies:

$ pipenv --rm
$ pipenv install