On Jul 6, 3:32 am, Lawrence D'Oliveiro <l... at geek- central.gen.new_zealand> wrote: > I wonder how many people have been tripped up by the fact that > > ++n > > and > > --n > > fail silently for numeric-valued n. Recent python-ideas discussion on this subject: http://mail.python.org/pipermail/python-ideas/2009-March/003741.html Mark