Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/traitlets/log.py: 42%

1"""Grab the global logger instance.""" 

2 

3# Copyright (c) IPython Development Team. 

4# Distributed under the terms of the Modified BSD License. 

5from __future__ import annotations 

6 

7import logging 

8from typing import Any 

9 

10_logger: logging.Logger | logging.LoggerAdapter[Any] | None = None 

11 

12 

13def get_logger() -> logging.Logger | logging.LoggerAdapter[Any]: 

14 """Grab the global logger instance. 

15 

16 If a global Application is instantiated, grab its logger. 

17 Otherwise, grab the root logger. 

18 """ 

19 global _logger 

20 

21 if _logger is None: 

22 from .config import Application 

23 

24 if Application.initialized(): 

25 _logger = Application.instance().log 

26 else: 

27 _logger = logging.getLogger("traitlets") 

28 # Add a NullHandler to silence warnings about not being 

29 # initialized, per best practice for libraries. 

30 _logger.addHandler(logging.NullHandler()) 

31 return _logger