Re: at what complexity, a comparison fails ?

On Dec 31, 2:45 am, Stef Mientki <stef.mien...@xxxxxxxxx> 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.
.