Test your knowledge: Python logging

Check logging levels, variable message data, logger/handler/formatter roles, exception tracebacks, and handler cleanup.

6 questions ~7 min Intermediate

Knowledge check

Check logging levels, variable message data, logger/handler/formatter roles, exception tracebacks, and handler cleanup.

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When is logging more appropriate than print()?

Logging adds severity and metadata to runtime events, while print() is ordinary output.
Which level is normally the default root logging threshold?

The root logger normally starts at WARNING unless configured otherwise.
Why pass message values as separate logging arguments?

Logger methods accept a message format string followed by values; formatting can be deferred.
Which component sends a log record to a destination?

A handler sends log records to a stream, file, or other destination; a formatter controls presentation.
What does logger.exception() add when called from an active exception handler?

logger.exception() logs at ERROR level with exception information and is normally used inside except.
What should code do with a FileHandler it creates and owns?

Detaching and closing a handler releases its resources and prevents unnecessary duplicate output.

When is logging more appropriate than print()?