On Monday, May 13, 2013 7:10:50 AM UTC-7, charles benoit wrote: > On Friday, September 4, 2009 4:52:11 PM UTC-7, Rami Chowdhury 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)
Thank You for setting that straight. I'm just learning Python and NONE of the tutorials I read said anything about that . In fact they all say a global can be called from inside a Function. If possible please contact the ppl that write these things.....I've heard of Ocam's razor but not Hanlon's??? -- http://mail.python.org/mailman/listinfo/python-list
