What nonlocal does

Question

What nonlocal does

Accepted Answer

nonlocal is the closure counterpart to global. Without it, assigning to a name inside a nested function creates a new local variable rather than modifying the enclosing one. The classic use case is a stateful counter inside a factory function: the inner function needs nonlocal n to increment n in the outer function's scope. Unlike global, nonlocal does not reach all the way to the module level - it stops at the nearest enclosing function that has the name.