We saw how to use the logging module with more advanced object-oriented design techniques. We created logs associated with modules, classes, instances, and functions. We used decorators to create logging as a consistent cross-cutting aspect across multiple class definitions.

We saw how to use the warnings module to show you that there's a problem with the configuration or the deprecated methods. We can use warnings for other purposes, but we need to be cautious about the overuse of warnings and creating murky situations where it's not clear whether the application worked correctly or not.