Logging

By default, Bolt will log information from your app to the output destination. After you've imported the logging module, you can customize the root log level by passing the level parameter to basicConfig(). The available log levels in order of least to most severe are debug, info, warning, error, and critical.

Outside of a global context, you can also log a single message corresponding to a specific level. Because Bolt uses Python’s standard logging module, you can use any its features.

import logging

# logger in a global context
# requires importing logging
logging.basicConfig(level=logging.DEBUG)

@app.event("app_mention")
def handle_mention(body, say, logger):
    user = body["event"]["user"]
    # single logger call
    # global logger is passed to listener
    logger.debug(body)
    say(f"{user} mentioned your app")