Pip and other aliases in Mac Catalina / ZSH

[payamazadi]

Mac Catalina uses ZSH by default. Which is what you'll get if you buy a new Mac. If you follow the guide, https://docs.python-guide.org/starting/install3/osx/#pipenv-virtual-environments, at the end, if you just run "pip" in your terminal, it will not be found.

After I changed the default terminal to bash, and reinstalled python with brew, then running "pip --version" gives pip version 3 as expected.

[sandrogisler]

Note that under the newest macOS, python3 is already installed. For that general point requiring updates to the descriptions, I opened https://github.com/realpython/python-guide/issues/1032