Example....

gistfile1.py

def pre_staging_restart_services():
    """
    Restart celery and gunicorn services

    Used by newer staging environments

    """
    # Install requirements
    with virtualenv():
        run('pip install -r /srv/CustomMade/requirements.txt')
    if 'web' in env.host:
        with virtualenv():
            run('/srv/CustomMade/manage.py compress')
        run("sudo supervisorctl restart gunicorn")
    if 'util' in env.host or 'management' in env.host:
        run("sudo supervisorctl restart celery")