after some conda packages installation, I restarted the computer and Fedora got stuck at starting. I booted in maintenance mode, tried dnf update just to get some clue, and got an error in /usr/lib/python3.6 

ModuleNotFoundError: No Module named 'librepo'

I get I messed up my python 3.6 somehow, but how is the best way to proceed to clean it up? and why the system is not starting normally?

Thanks

**Edit**: 

Thanks for the answers. Unfortunately they reached me too late. I needed to work with my computer so I reinstalled the whole system. Other ideas didn't occur to me because it was evident that something was very wrong with the package manager systems (both dnf and yum were compromised). 

Re: <https://stackoverflow.com/questions/48291272/no-module-librepo-after-installing-pytorch-on-fedora27/48726460#48726460> I do agree with: "Fedora is not completely compatible with conda." I don't know about "Fedora bug reports get closed as duplicate with links to obviously unrelated reports." because I didn't try filing a bug report.

Thanks again