Excuse me, there is one character too much in the example program. This time I send it as an attachment. Eike. -------------- next part -------------- A non-text attachment was scrubbed... Name: test.py Type: application/x-python Size: 96 bytes Desc: not available Url : http://mail.python.org/pipermail/tutor/attachments/20070510/ba7b2e62/attachment.bin