Loguru Python Logging

Simple Python logging library. Current version: 0.7.3 (Mar 2026). One global logger — no instantiation needed, just import. Default sink is stderr (not stdout). diagnose=True is the DEFAULT — shows variable values in tracebacks — leaks sensitive data in production. Must call logger.remove() before reconfiguring. Library authors must never call logger.add() — use logger.disable() instead. enqueue=True requires logger.complete() on shutdown to flush queued messages.