Python: Figure out local timezone

I want to compare UTC timestamps from a log file with local timestamps. When creating the local datetime object, I use something like:

>>> local_time=datetime.datetime(2010, 4, 27, 12, 0, 0, 0, 
                                 tzinfo=pytz.timezone('Israel'))

I want to find an automatic tool that would replace thetzinfo=pytz.timezone('Israel') with the current local time zone.

Any ideas?

Try dateutil, which has a tzlocal type that does what you need.