Describing Logging in Flask
- Flask uses the standard Python
loggingmodule - Messages are logged with
app.logger - This takes the same name as
app.name - The following is an example of this:
>>> @app.route('/login', methods=['POST'])
>>> def login():
... user = get_user(request.form['username'])
... if user.check_password(request.form['password']):
... login_user(user)
... app.logger.info('%s success', user.username)
... return redirect(url_for('index'))
... else:
... app.logger.info('%s failed', user.username)
... abort(401)Basic Configuration
- Logging should happen at the start of a program
- The logger should be configured before the application object is created
- This is an example of logging configuration:
>>> from logging.config import dictConfig
>>> dictConfig({
... 'version': 1,
... 'formatters': {'default': {
... 'format': 'message'
... }},
... 'handlers': {'wsgi': {
... 'class': 'logging.StreamHandler',
... 'stream': 'ext://flask.logging.ers',
... 'formatter': 'default'
... }},
... 'root': {
... 'level': 'INFO',
... 'handlers': ['wsgi']
... }
... })
>>> app = Flask(__name__)References
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