mac python update code example
Example 1: mac os install python 3
brew install python3
Example 2: how to set default python version in macos
ln -s -f /usr/local/bin/python3.7 /usr/local/bin/python
Example 3: set python 3 as default mac
[ -e ~/.profile ] && . ~/.profile
Example 4: command to install python3.6 on mac os
$ brew install --ignore-dependencies https://raw.githubusercontent.com/Homebrew/homebrew-core/f2a764ef944b1080be64bd88dca9a1d80130c558/Formula/python.rb