My Global Variable In Python Cannot Be Referenced From Outside The Def It Was Created In

I am building a maze solver using the breadth first search algorithm and I keep hitting an error that says UnboundLocalError: local variable 'starting_point' referenced before assi

Solution 1:

global tells a function to skip creating a local function slot for the variable and instead look in the global namespace. It doesn't actually create the variable. Since you don't call finished_maze, visited is never assigned.