基于某些条件的python日志记录

Question

i am using python logging module to perfrom lots of logging in my application. it works fine when i use different handlers to log to stdout and file . my usecase is: on local testing log to stdout while on production deployment log to file insted of stdout.

so i was lokking for some condition based log (ex; based on some environment variable value) if its local log to stdout otherwise file.

here is how i can achieve using two handlers:

logger = logging.getLogger("logging")
formatter = logging.Formatter('%(asctime)s | %(name)s |  %(levelname)s: %(message)s')
logger.setLevel(logging.DEBUG)

stream_handler = logging.StreamHandler()
stream_handler.setLevel(logging.INFO)
stream_handler.setFormatter(formatter)

logFilePath = "my.log"
file_handler = logging.handlers.TimedRotatingFileHandler(filename = logFilePath, when = 'midnight', backupCount = 30)
file_handler.setFormatter(formatter)
file_handler.setLevel(logging.DEBUG)

logger.addHandler(file_handler)
logger.addHandler(stream_handler)

Answer 1

I'm going to add some code to my initial commment:

import os
logger = logging.getLogger("logging")
formatter = logging.Formatter('%(asctime)s | %(name)s |  %(levelname)s: %(message)s')
logger.setLevel(logging.DEBUG)

if os.getenv("ENV_VAR_YOU_WANT"):
    handler = logging.StreamHandler()
    handler.setLevel(logging.INFO)
    handler.setFormatter(formatter)

else:
    logFilePath = "my.log"
    handler = logging.handlers.TimedRotatingFileHandler(filename = logFilePath, when = 'midnight', backupCount = 30)
    handler.setFormatter(formatter)
    handler.setLevel(logging.DEBUG)

logger.addHandler(handler)