The line length of max. 80 chars is a part of PEP8 style on which we agreed... I thought that I am required to break the lines that way (and PyDev in Eclipse complains if I don't do so). I do not like it myself... I also think 80 is too short.

So you suggest we should set the limit higher (or have no limit at all)? If you're suggesting a limit of 180, I would say it's too much. I think 100-128 is the reasonable range.