Python's 'UnboundLocalError' — It's Not a Missing Variable, It's Scope Decided in Advance

The variable has a value elsewhere in your program — just not in the scope Python already decided this line belongs to. Here's how Python actually assigns scope, and why the fix usually isn't global. Adapted from the Python Essentials Companion Guide. You write a small counter function, and it looks completely reasonable: count = 0 def...