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## Summary Treat `Callable`s as bound-method descriptors if `Callable` is the return type of a decorator that is applied to a function definition. See the [rendered version of the new test file](https://github.com/astral-sh/ruff/blob/david/callables-as-descriptors/crates/ty_python_semantic/resources/mdtest/call/callables_as_descriptors.md) for the full description of this new heuristic. I could imagine that we want to treat `Callable`s as bound-method descriptors in other cases as well, but this seems like a step in the right direction. I am planning to add other "use cases" from https://github.com/astral-sh/ty/issues/491 to this test suite. partially addresses https://github.com/astral-sh/ty/issues/491 closes https://github.com/astral-sh/ty/issues/1333 ## Ecosystem impact All positive * 2961 removed `unsupported-operator` diagnostics on `sympy`, which was one of the main motivations for implementing this change * 37 removed `missing-argument` diagnostics, and no added call-error diagnostics, which is an indicator that this heuristic shouldn't cause many false positives * A few removed `possibly-missing-attribute` diagnostics when accessing attributes like `__name__` on decorated functions. The two added `unused-ignore-comment` diagnostics are also cases of this. * One new `invalid-assignment` diagnostic on `dd-trace-py`, which looks suspicious, but only because our `invalid-assignment` diagnostics are not great. This is actually a "Implicit shadowing of function" diagnostic that hides behind the `invalid-assignment` diagnostic, because a module-global function is being patched through a `module.func` attribute assignment. ## Test Plan New Markdown tests. |
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