Get macOS password from the 'security' command in python

grab_gh_password.py

import subprocess
import re

# Grab password from macOS keychain
def grab_gh_password():
    invocation = ['security', 'find-internet-password', '-gs', 'github.com']
    block = subprocess.Popen(invocation, stdout = subprocess.PIPE, stderr = subprocess.PIPE)
    lastline = block.stderr.read().strip().decode("utf-8")
    parsed_password = re.sub('password: "(.*)"', '\\1', lastline)
    return parsed_password