I have a few versions of Python on ubuntu 16.04 LTS -> how to remove some and not to break down the system

Question

I've installed a few version of Python on ubuntu 16.04 LTS, please see a screenshot.

When I tried to delete/uninstall one (not 2.7.12)-> I broke my system, then recovered again.

Is there any way to remove all versions of Python except core 2.7.12 safely / not breaking any dependencies and system?

Plus I have problems with zlib1g-dev now:

Thanks a lot for your help

Answer 1

When Python 3.6.1 is installed via ./configure -> make -> make install, it should be uninstalled by running make uninstall from the same directory.