install python3 macos code example
Example 1: mac os install python 3
brew install python3
Example 2: command to install python3.6 on mac os
$ brew switch python 3.6.5_1
Example 3: command to install python3.6 on mac os
$ brew switch python 3.7.4_1
Example 4: command to install python3.6 on mac os
$ brew unlink python