add comment about type annotations in CachedMapperCache

inducer · Jan 28, 2025 · 0bfb2b2 · 0bfb2b2
1 parent 56b162a
commit 0bfb2b2
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/pytato/transform/__init__.py b/pytato/transform/__init__.py
@@ -307,6 +307,10 @@ def add(
             self,
             key_inputs:
                 CacheExprT
+                # Currently, Python's type system doesn't have a way to annotate
+                # containers of args/kwargs (ParamSpec won't work here). So we have
+                # to fall back to using Any. More details here:
+                # https://github.com/python/typing/issues/1252
                 | tuple[CacheExprT, tuple[Any, ...], dict[str, Any]],
             result: CacheResultT,
             key: CacheKeyT | None = None) -> CacheResultT: