Using variables with python tag

[Helper]

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 08/06/2012 at 09:36, xxxxxxxx wrote:

I am beginning to think I do not quite understand the relation between cinema 4d and python.
I have a python tag with a some simple code (see below).
What I want to achieve is store data on frame x and use in frame x+1.

For frame 0 it is ok, but for other frames I get the message "referenced before assignment".
I do understand the message and why it is given, but it tells me that the code is executed every frame and the variables are initialized every time.

I can use userdata or the BaseContainer, that solves my issues, but I would like to understand.
I also tried global variables, but that didn't help either.

What to do?

def main() :

print "\n----------\n"

frame = doc.GetTime().GetFrame(doc.GetFps())
if (frame ==0) :
  varx = 0
else:
  varx = varx + frame

print "varx: ", varx

[Helper]

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 08/06/2012 at 09:43, xxxxxxxx wrote:

Sorry, I did not search the forum before asking.

The solution is simple.
Just init the variable outside main and define it as global within main.

varx=-1

def main() :

global varx