[Python] Changing logging's 'basicConfig' which is already set

I am using the logging module in python as:

import logging, sys

logger = logging.getLogger(__file__)
logging.basicConfig(
stream=sys.stderr,
level=logging.DEBUG,
format='%(filename)s:%(lineno)s %(levelname)s:%(message)s')
logger.debug("Hello World")


Now, after I have set the basic configuration, I want to have a command line argument that can change the output stream from sys.stderr to a file.

I have read the doc and it says that if both filename and stream are present at the same time, the stream is ignored.

How do I change the stream to a file after I have already done the basicConfig?

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