How to write to a file, using the logging Python module?

Question

How can I use the logging module in Python to write to a file? Every time I try to use it, it just prints out the message.

Answer 1

http://docs.python.org/library/logging.html#logging.basicConfig

logging.basicConfig(filename='/path/to/your/log', level=....)

Answer 2

Here is two examples, one print the logs (stdout) the other write the logs to a file:

import logging
import sys

logger = logging.getLogger()
logger.setLevel(logging.INFO)
formatter = logging.Formatter('%(asctime)s | %(levelname)s | %(message)s')

stdout_handler = logging.StreamHandler(sys.stdout)
stdout_handler.setLevel(logging.DEBUG)
stdout_handler.setFormatter(formatter)

file_handler = logging.FileHandler('logs.log')
file_handler.setLevel(logging.DEBUG)
file_handler.setFormatter(formatter)


logger.addHandler(file_handler)
logger.addHandler(stdout_handler)

With this example, all logs will be printed and also be written to a file named logs.log

Answer 3

http://docs.python.org/library/logging.handlers.html#filehandler

The FileHandler class, located in the core logging package, sends logging output to a disk file.