Answers for "running python on mac"

which python mac

$ brew update && brew upgrade python

install python in mac

brew install python3
brew install python2

mac why is python installed in usr and application

$ pyenv global 3.7.3
# and verify it worked 
$ pyenv version
3.7.3 (set by /Users/mbbroberg/.pyenv/version)

how to make python open an application on mac

import os
os.system("""osascript -e 'tell app "Safari" to open'""")