Changing logging’s ‘basicConfig’ which is already set

If you look in the Python sources for logging/__init__.py, you’ll see that basicConfig() sets the handlers on the root logger object by calling addHandler(). If you want to start from scratch, you could remove all existing handlers and then call basicConfig() again.

# Example to remove all root logger handlers and reconfigure. (UNTESTED)
import logging

# Remove all handlers associated with the root logger object.
for handler in logging.root.handlers[:]:
    logging.root.removeHandler(handler)

# Reconfigure logging again, this time with a file.
logging.basicConfig(filename="myfile.log", level=logging.DEBUG, format="%(filename)s:%(lineno)s %(levelname)s:%(message)s")