How does codehound find the enclosing function / detect awaited calls?

[kratos0718]

Question: Why does codehound build a child-to-parent map of the AST instead of just walking the tree top-down?

I see most of the checks call enclosing_function() and is_awaited() — how do those work without parent links?

[kratos0718]

Python's ast nodes know their children but not their parent. So codehound does one pass per file building a {id(child): parent} map (build_parents). Every check then walks upward through that map:

• enclosing_function(node) climbs parents until it hits a FunctionDef/AsyncFunctionDef — that's how CH001 knows a call is inside an async def.
• is_awaited(node) simply checks whether the node's parent is an ast.Await — that's how CH001 skips await client.post(...) and avoids false positives.

Building the map once is O(n) and keeps each check simple and precise.