Python AWS Lambda function to delete branches which have been merged into master

delete_branches_merged_into_master.py

import subprocess
import os

def run(command):
    print(command)
    process = subprocess.call(command, shell=True, cwd='/tmp/')

def lambda_handler(event, context):
    GITHUB_EMAIL = os.environ['GITHUB_EMAIL']
    GITHUB_USERNAME = os.environ['GITHUB_USERNAME']
    GITHUB_REPO = os.environ['GITHUB_REPO']
    GITHUB_TOKEN = os.environ['GITHUB_TOKEN']
    
    commands = (
        'rm -rf /tmp/*',
        f"git clone @github.com/{GITHUB_USERNAME}/{GITHUB_REPO}.git">https://{GITHUB_USERNAME}:{GITHUB_TOKEN}@github.com/{GITHUB_USERNAME}/{GITHUB_REPO}.git .",
        'git branch -r | grep -v master | cut -d/ -f2- | xargs -n 1 git push origin --delete'
    )    
    for command in commands:
        run(command)