Python 3.11+loggingfunction

logging.getLevelNamesMapping()

levels

Returns a dict mapping level names to numbers, such as {'INFO': 20}. Handy for parsing a level from settings or the command line.

Syntax

mapping = logging.getLevelNamesMapping()

Each call returns a fresh copy: editing it changes nothing in logging, and new levels are added with addLevelName(). Keys are uppercase only, so call upper() on a level read from configuration before looking it up. The dict includes the aliases WARN and FATAL, so its values repeat. Available since 3.11.

Examples

import logging
levels = logging.getLevelNamesMapping()
print(levels['debug'.upper()], levels['WARN'], levels['FATAL'])  # → 10 30 50
levels['TRACE'] = 5
print('TRACE' in logging.getLevelNamesMapping())  # → False — это копия

See also

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