f.py

    api = MyApi()

    fileh = logging.FileHandler('/tmp/myapp.log', 'a')
    fileh.setLevel(logging.INFO)
    formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
    fileh.setFormatter(fileh)
    api.logger.addHandler(fileh)

    api.do_something_that_contains_a_logging_call() # myapp.log gets created, but is empty