Upgrade to python 3 opinion

[snippsat]

Is it correct to say that, if we want to keep python 2 functionality, but we need python 3 functionality on all our servers for a new app, and we don't want python 3 to interfere -- that is, we want both python 2 and python 3 to function without issues -- that we are safe to install the above two packages on all (about 300) of our servers?

Look into using pyenv is a safe option and can switch seamlessly between Python versions.
My Tutorial pyenv Simple Python Version Management
For Centos Pyenv Install Centos 8 .
Wiki for all OS.