I've upgraded, and as usual with Python, It Just Works.
Cool stuff in there - see Andrew Kuchling's What's New in Python 2.3 for details.
Update: See also Alex Martelli's What's New in Python 2.3? for another overview, less exhaustive (which isn't like Alex), but which covers some of the most useful enhancements in some detail.
Posted to Python by Simon Brunning at July 01, 2003 10:13 AM