Python log level cannot be set-CodePudding

Here is my code

logger = logging.getLogger("JarvisAI")
# Create handlers
c_handler = logging.StreamHandler()
f_handler = logging.FileHandler(logname)
c_handler.setLevel(logging.WARNING)
f_handler.setLevel(logging.INFO)

# Create formatters and add it to handlers
c_format = logging.Formatter('%(name)s - %(levelname)s - %(message)s', "%Y-%m-%d %H:%M:%S")
f_format = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s', "%Y-%m-%d %H:%M:%S")
c_handler.setFormatter(c_format)
f_handler.setFormatter(f_format)

# Add handlers to the logging
logger.addHandler(c_handler)
logger.addHandler(f_handler)

Running logger.info("Test") does not produce anything in the logfile. However logger.warning and other higher log level works fine both in console and file. Pls help.

CodePudding user response：

The logger itself also has a logging level, and that needs to be below (or above, depending on your point of view) that of the handlers to show the handlers' output:

logger.setLevel(logging.INFO)

(or even debug level: the formatters' levels will prevent debugging info from being output anyway) will do that.

This is also shown in the first code block of the Python logging cookbook. Have a read through it.

The reason you are getting warning and higher log level output, is because warning is the default logging level.