On Dec 31, 2:45 am, Stef Mientki <[EMAIL PROTECTED]> wrote:
> So what I need was something like:
> if A != A_prev :
> ... do something
> A_prev = A
If A_prev is not declared prior to the if statement, you will get an
error when you try to compare the non-existing variable to A. This
code will work, at least for the snippet you provided.
A_prev=""
if A != A_prev :
... do something
A_prev = A
Please cut and paste the exact error message in the future.
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