It's hard to be certain, but the entrypoint is likely referring to one of the setuptools entry points, and so it's the installer that's detecting that setuptools or one of its dependencies isn't ...
It's possible we already have a ticket for this, but #1457 revived the idea. Here are my thoughts: I'm interested in dropping support for new releases on Python 2.7. I can imagine maintaining support ...
Replace “python” with “python3” for installing Python 3.x version. Please note that get-pip.py will also install setuptools and wheel. As I mentioned earlier ...