Flask Development Logging

import sysimport loggingfrom flask import Flaskapp = Flask(__name__)app.logger.setLevel(logging.DEBUG)# logging.basicConfig(level=logging.DEBUG)# logging.getLogger().setLevel(logging.DEBUG)# create a local module loggerlog = logging.getLogger(__name__)if not log.handlers:    log.setLevel(logging.DEBUG)    formatter = logging.Formatter(fmt="%(asctime)s %(levelname)s %(module)s: %(message)s",                              datefmt="%H:%M:%S")    handler = logging.StreamHandler(sys.stdout)    handler.setLevel(logging.DEBUG)    handler.setFormatter(formatter)    # log.propagate = False    log.addHandler(handler)@app.route('/')def test_logging():    app.logger.info('app.logger')    print('print')    # same as app.logger    logging.getLogger('flask.app').info('flask.app')    log.info('module log')    return 'Test logging'if __name__ == '__main__':    app.run(host='127.0.0.1', port=8088, debug=True)

[2019-04-25 11:29:17,796] INFO in test: app.logger
print
[2019-04-25 11:29:17,797] INFO in test: flask.app
11:29:17 INFO test: module log
127.0.0.1 - - [25/Apr/2019 11:29:17] "GET / HTTP/1.1" 200 -