The availability of a mature Python interpreter is gradually producing mainstream applications and not just novelties. Witness the acronymically-named IoUYoM (I owe yoU, You owe Me), which was just released and lets you keep track of what you've lent and to whom, plus what you've borrowed, etc.
Read on in the full article.
it is not working on my E90
Do you have Python installed on your E90 ? It's a prerequisite to run IouYom.
Please follow the Instructions here: http://wiki.opensource.nokia.com/projects/Installing_PyS60
There is also a new version out which you might try.
If you have any further questions please open a bug at sharesource.org