pip3 install dvc: uninstalls cryptography about dvc HOT 1 CLOSED

Here's your problem.

#7 35.12   Attempting uninstall: cryptography
#7 35.12     Found existing installation: cryptography 2.8
#7 35.12     Not uninstalling cryptography at /usr/lib/python3/dist-packages, outside environment /usr
#7 35.12     Can't uninstall 'cryptography'. No files were found to uninstall.

You are installing an older version of cryptography with python3-openssl, but some dependency of dvc require new version.
Try adding sudo pip3 uninstall cryptography before installing dvc and see? Or, install a latest version of python3-opensslthroughpip`.

There's nothing to do on dvc side. Closing.

from dvc.