How can I use Homebrew to install both Python 2 and 3 on Mac?

Question

I need to be able to switch back and forth between Python 2 and 3. How do I do that using Homebrew as I don\'t want to mess with path and get into trouble. Right now I have

Answer 1

Use asdf !

Ballad of asdf

Once upon a time there was a programming language
There were many versions of it
So people wrote a version manager for it
To switch between versions for projects
Different, old, new.

Then there came more programming languages
So there came more version managers
And many commands for them

I installed a lot of them
I learnt a lot of commands

Then I said, just one more version manager
Which I will write instead

So, there came another version manager
asdf version manager - https://github.com/asdf-vm/asdf

A version manager so extendable
for which anyone can create a plugin
To support their favourite language
No more installing more version managers
Or learning more commands

https://github.com/asdf-vm/asdf
https://github.com/tuvistavie/asdf-python
https://github.com/asdf-vm/asdf-plugins