Unresolved reference Python?

Question

Python

There is a declared variable previous_direction. I use it in a class function.

def change_direction(self,event):

        if event.keysym in self.mapping:

         if previous_direction==antidirections[event.keysym]:
          ....
         else:
         previous_direction=...

When I use this variable twice, an Unresolved reference error occurs. What to do in this case?

Answer 1

Apparently the previous_direction variable is initialized in the body of another function or the class itself, and is not visible to this one. Try self. previous_direction.