Python Env Wrapper is a set of commands to manage multiple virtual environments. Pew can create, delete and copy your environments, using a single command to switch to them wherever you are, while keeping them in a single (configurable) location.
Fedora provides excellent native means for using multiple different Python versions. One can install a non-default Python version, e.g. Python 3.6, by using:
sudo dnf install python36
For more information, refer to: https://developer.fedoraproject.org/tech/languages/python/multiple-pythons.html.
Hence, removing the Python versions management from Pew itself should really be a non-issue. In addition, there is strong support upstream to either remove Pew's Python version management or replace it with pyenv: https://github.com/berdario/pew/issues/195.