Solved: Disable console messages in Flask server

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Flask server is a widely-used web framework that’s accessible and simple to setup. However, sometimes there might be a bunch of console logs which might disturb the actual purpose of your Flask application. In such scenarios, disabling console messages can come in handy and can make your work seamless. This article provides an in-depth guide on how you can disable console messages on your Flask server.

Flask leverages the flexibility and accessibility of Python, providing a powerful tool for web developers. But, like any tool, understanding how to use it effectively is key.

Disabling Console Messages in Flask

It’s actually quite simple to disable console messages in Flask. By changing the level of Flask’s logger, you can manage which messages are printed to the console. Here’s the solution:

import logging

log = logging.getLogger('werkzeug')

Understanding the Code

The first line imports the logging module, which is Python’s built-in solution for logging application events. The second line creates an instance of a logger with the name ‘werkzeug’. This is the logger that Flask uses by default.

The third line sets the level of the logger to ERROR. Logger levels designate the severity of the messages the logger will handle. By setting the level to ERROR, the logger will only handle events that have this level and only messages of this severity are displayed.

Logging Libraries in Flask

  • Werkzeug: Flask is based on Werkzeug WSGI toolkit and Jinja2 template engine. Werkzeug comes with a built-in logger. This is the logger that is targeted when the log level is changed in the previous code snippet.
  • Logging: Python’s built-in logging module is also powerful, easy to use and customisable. This module provides a way for applications to configure different log handlers and to set a logging level.

Flask and Python Functions

Flask uses several Python functions as a part of its framework. The getLogger() method is one of the key functions as it is used to instantiate a logger object. Also, the setLevel() function helps in adjusting the threshold for this logger to level.

There are numerous ways to further customise and adapt your Flask server’s logging and this article provides you a jumpstart on it. I hope this has been informative and aids in your Flask server journey. Do note, logging is important and should be used judiciously, only disable when you’re sure these messages provide no value to your use-case.

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