Instead, it is recommended that you transition to using 'python3' from within Terminal. code example

Example 1: how to set default python version in macos

ln -s -f /usr/local/bin/python3.7 /usr/local/bin/python

Example 2: transition from python 2 to 3 terminal

alias python="python3"

Example 3: Instead, it is recommended that you transition to using 'python3' from within Terminal.

$ brew update && brew upgrade python