Python logging: reverse effects of disable()

Question

The logging docs say that calling the logging.disable(lvl) method can "temporarily throttle logging output down across the whole application," but I'm having trouble finding the "temporarily." Take, for example, the following script:

import logging
logging.disable(logging.CRITICAL)
logging.warning("test")
# Something here
logging.warning("test")

So far, I haven't been able to find the Something here that will re-enable the logging system as a whole and allow the second warning to get through. Is there a reverse to disable()?

unutbu · Accepted Answer · 2011-08-04 20:39:10Z

18

logging.disable(logging.NOTSET)

answered Aug 4, 2011 at 20:39

unutbu

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2 Comments

Tim Over a year ago

Fantastic, and - in retrospect - pretty obvious :) Thanks!

gb. Over a year ago

Any way to contact python documentation team? Something is obviously missing there.

Graham Klyne · Accepted Answer · 2014-10-09 12:22:42Z

Based on the answer by @unutbu, I created a context manager:

import logging
log = logging.getLogger(__name__)

class SuppressLogging:
    """
    Context handler class that suppresses logging for some controlled code.
    """

    def __init__(self, loglevel):
        logging.disable(loglevel)
        return

    def __enter__(self):
        return 

    def __exit__(self, exctype, excval, exctraceback):
        logging.disable(logging.NOTSET)
        return False

if __name__ == "__main__":
    logging.basicConfig(level=logging.INFO)
    log.info("log this")
    with SuppressLogging(logging.WARNING):
        log.info("don't log this")
        log.warning("don't log this warning")
        log.error("log this error while up to WARNING suppressed")
    log.info("log this again")

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