Getting the logging level from text representation

Antoon Pardon antoon.pardon at
Wed Sep 2 12:14:44 CEST 2015

Op 02-09-15 om 11:50 schreef Peter Otten:
> Antoon Pardon wrote:
>> I am writing an application that will do the necessary logging.
>> However I want the level of logging to be deciced by a value
>> in a config file. Like the following:
>> loglevel = WARNING
>> But I can't find a function that does this.
>> The reverse is possible with logging.getLevelName. The documentation
>> also states this:
>> Changed in version 3.4: In Python versions earlier than 3.4, this function
>> could also be passed a text level, and would return the corresponding
>> numeric value of the level. This undocumented behaviour was considered
>> a mistake, and was removed in Python 3.4, but reinstated in 3.4.2 due
>> to retain backward compatibility.
>> So what is the supposed correct way to handle this? Preferably one
>> that works when additional levels have been introduced.
> Why do you want to convert the name into a number? You can use it directly: 

Well because that is a recent change and I didn't know about it and
I missed it while browsing the documentation. I think this kind of
documenation should be part of the proper description and not part
of the history.

It also doesn't work for everything. Logger.isEnabledFor(lvl)
expect a number.

But for the moment it serves my needs, so thanks for pointing it out.

Antoon Pardon.

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