Pip was not part of Python by default for a long time.

vram22 · on Dec 20, 2018

Right.

A post on my blog:

pip now installed with Python 2.7.9:

https://jugad2.blogspot.com/2015/03/pip-now-installed-with-p...

which mentions:

https://docs.python.org/2.7//installing/index.html

and::

https://pip.pypa.io/en/latest/installing/#pip-included-with-...

I've used Python versions before that, where you had to install pip separately, and it was not trivial (to find it / install it), although not very difficult either.