Wow!!! Thanks a million!! It worked! = DThanks for the fast reply too! Helvin
On Sat, Sep 5, 2009 at 11:52 AM, Rami Chowdhury <rami.chowdh...@gmail.com>wrote: > global no_picked >> no_picked = 0 >> >> def picked(object, event): >> no_picked += 1 >> print no_picked >> > > In order to be able to affect variables in the global scope, you need to > declare them global inside the function, and not at the global scope. So > your code should read: > > no_picked = 0 > > def picked(object, event): > global no_picked > no_picked += 1 > print no_picked > > I believe that will work. > > > On Fri, 04 Sep 2009 16:43:27 -0700, Helvin <helvin...@gmail.com> wrote: > > Hi, >> >> This increment thing is driving me nearly to the nuts-stage. > < >> >> I have a function that allows me to pick points. I want to count the >> number of times I have picked points. >> >> global no_picked >> no_picked = 0 >> >> def picked(object, event): >> no_picked += 1 >> print no_picked >> >> Error msg says: UnboundLocalError: local variable 'no_picked' >> referenced before assignment >> For some reason, no_picked does not increment, but the printing >> statement works. >> >> Do you know why? >> >> (I'm actually writing this for a vtkrenderwindowinteractor.) >> >> Helvin >> > > > > -- > Rami Chowdhury > "Never attribute to malice that which can be attributed to stupidity" -- > Hanlon's Razor > 408-597-7068 (US) / 07875-841-046 (UK) / 0189-245544 (BD) > -- Helvin "Though the world may promise me more, I'm just made to be filled with the Lord."
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