Function python_comprehension_binds_name_at 

pub fn python_comprehension_binds_name_at(
    name: &str,
    reference: Node<'_>,
    source: &str,
) -> bool

Whether reference reads a target introduced by an enclosing comprehension.

Comprehensions create an implicit scope even at module level. The element expression is textually before its for clauses but evaluates after their binders. Only the first iterable evaluates in the enclosing scope; later iterables use comprehension-local names, including not-yet-bound targets. This structured walk models those scopes without source-text parsing.