I conducted an experiment to try to find out what versions of Python people use. In the last release of pychecker, I asked people to take a survey (http://metaslash.com/pyversion.html). While not scientific, it provides some info. There were 186 responses, with 2 apparent duplicates. Nobody used only one version of Python with that version being 2.1 or below. 110 people only use a single version of python with 10 using 2.2 only, 108 using 2.3 only, and 2 using 2.4 only. Here are the total number of responses by version: 1.5 5, all 5 also use 2.3 2.0 3 2.1 13 2.2 72 2.3 172 2.4 23 The raw responses are here: http://metaslash.com/pyver.txt Neal