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32 lines
955 B
Python
32 lines
955 B
Python
"""Grab the global logger instance."""
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# Copyright (c) IPython Development Team.
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# Distributed under the terms of the Modified BSD License.
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from __future__ import annotations
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import logging
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from typing import Any
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_logger: logging.Logger | logging.LoggerAdapter[Any] | None = None
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def get_logger() -> logging.Logger | logging.LoggerAdapter[Any]:
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"""Grab the global logger instance.
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If a global Application is instantiated, grab its logger.
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Otherwise, grab the root logger.
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"""
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global _logger # noqa: PLW0603
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if _logger is None:
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from .config import Application
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if Application.initialized():
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_logger = Application.instance().log
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else:
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_logger = logging.getLogger("traitlets")
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# Add a NullHandler to silence warnings about not being
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# initialized, per best practice for libraries.
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_logger.addHandler(logging.NullHandler())
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return _logger
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