What does '--log=INFO' mean in Python Logging HOWTO

Question

I read the Python Logging HOWTO, and there is a description I don't understand:

If you want to set the logging level from a command-line option such as:
--log=INFO
and you have the value of the parameter passed for --log in some variable loglevel, you can use:
getattr(logging, loglevel.upper())
to get the value which you’ll pass to basicConfig() via the level argument.

What does it mean? There is no example, it would be nice if someone could give one.

Can I set the logging level like this?

logging --log=INFO

Not an answer to this particular question, but related: https://stackoverflow.com/questions/14097061/easier-way-to-enable-verbose-logging — mkrieger1, Aug 05 '17 at 16:48

score 6 · Accepted Answer · answered Aug 05 '17 at 17:00

The assumption is that you are using something like argparse to define command line arguments:

import argparse
p = argparse.ArgumentParser()
p.add_argument("--log")

args = p.parse_args()
loglevel = args.log

The argument to the --log option should then be one of the level constants defined in the logging module; getattr(logging, loglevel.upper()) would then be a way to get that value for a string.

What does '--log=INFO' mean in Python Logging HOWTO

1 Answers1