How about using something like
$ python
Python 2.7.6 (default, Jun 22 2015, 17:58:13)
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import logging
>>> getattr(logging, 'INFO')
20
>>> getattr(logging, 'DEBUG')
10
>>> getattr(logging, 'ERROR')
40
>>>