Software Architecture with Python

Logging as a debugging technique

Python comes with standard library support for logging via the aptly named logging module. Though print statements can be used as a quick and rudimentary tool for debugging, real-life debugging mostly requires that the system or application generate some logs. Logging is useful because of the following reasons:

• Logs are usually saved to specific log files, typically, with timestamps, and remain at the server for a while until they are rotated out. This makes debugging easy even if the programmer is debugging the issue some time after it happened.
• Logging can be done at different levels—from the basic INFO to the verbose DEBUG levels—changing the amount of information output by the application. This allows the programmer ...