[FIXED] Logger that logs to console and file at different levels

Issue

I have a bootstrap script for a Raspberry Pi that runs in python. I am looking to create a logger that logs to a file as well as to the console.

I was going to do something like this:

logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s [%(threadName)-12.12s] [%(levelname)-5.5s]  %(message)s",
    handlers=[
        logging.FileHandler("{0}/{1}.log".format(logPath, fileName)),
        logging.StreamHandler()
    ])

But what I would really like is to log INFO to the StreamHandler and DEBUG to the FileHandler... I cannot seem to figure that out.

Can anyone help me out?

Using Python 3.7.5

Solution

You could build the logger yourself (either through a config file or in pure python)

The tricky thing that I have wasted several hours on is forgetting to set the log level on the logger as well as on each of the handlers. Ensure that the logger is as permissive as the most permissive handler.

example script

# emits the info line to the console and
# both the info & debug lines to the log file

# test_pylog.py
import logging

log_format = logging.Formatter(
  '%(asctime)s %(threadName)s %(levelname)s %(message)s'
)

logger = logging.getLogger(__name__)

console_handler = logging.StreamHandler()
console_handler.setLevel(logging.INFO)
console_handler.setFormatter(log_format)

logger.addHandler(console_handler)

file_handler = logging.FileHandler('logfile.txt')
file_handler.setLevel(logging.DEBUG)
file_handler.setFormatter(log_format)

logger.addHandler(file_handler)
logger.setLevel(logging.DEBUG)
if __name__ == '__main__':
  logger.debug('Panic! at the disco')
  logger.info('Weezer')

Answered By - Haleemur Ali