Here's the statement checking code, which I believe is pre-AST [1]. I would have to dig more to see if that check is there to prevent invalid AST or to just "he

Here's the statement checking code, which I believe is pre-AST [1]. I would have to dig more to see if that check is there to prevent invalid AST or to just "help the user" (would depend on how they reference the original variable I suppose). But wow, that's the first time I've seen "nonlocal". In the ~100 packages I have installed, I see 0 usages! [1] https://github.com/python/cpython/blob/a6a3dbb7db0516a72c5ef149223d904f4e6a31ae/Python/ast.c#L714 https://github.com/python/cpython/blob/a6a3dbb7db0516a72c5ef...