Python logger with multiple modules

Question

I want to create my custom logger class

import logging
class mylooger():
   def __init__(module_name):
       logger=logging.getlogger(module_name)

And i want use logger in my main file and two other files

main.py
test1.py
test2.py

i want to decide my logfile path in main.py and keep main.py, test1.py and test2.py file log in same file.

Now suppose later i want to import test1.py and test2.py in some other file e.g main1.py. So i want to decide my logfile path from main1.py and keep main1.py, test1.py and test2.py log in same file.

Unclear what you are asking. logger is just a local variable to __init__, and getLogger already returns a reference to a unique Logger object based on its argument. — chepner
– chepner, Commented Feb 12, 2019 at 16:47

r.ook · Accepted Answer · 2019-02-12 17:03:15Z

1

That's not how stdlib logging is designed. If you want to use the same logger in multiple modules, just get the same logger:

# in main.py
logger = logging.getLogger("mylogger")

def main():
    ...
    logging.basicConfig(...)
    logger.info("some event")

And:

# in test1.py
logger = logging.getLogger("mylogger")

def some_lib_function():
    ...
    logger.debug("some other event")

The logging framework itself maintains a global mutable state so that these are resolving to the same loggers and hence the same formatters/handlers.

edited Feb 12, 2019 at 17:03

r.ook

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answered Feb 12, 2019 at 16:47

wim

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