title: Using pytz to convert from a known timezone to local
body: <p>I'm receiving a date in a fixed timezone. I need to convert it to the local machine's timezone, but I don't know what that is. How can I do this using pytz (<em>not</em> dateutil)? I've found plenty of solutions which use dateutil, e.g. <a href="https://stackoverflow.com/a/4771733/96079">this answer</a>, but I can't find a similar function in pytz.</p>