mypy: fix errors from pytato typing improvements

alexfikl · inducer · commit a59a9c858663 · 2024-11-13T13:34:56.000-06:00
diff --git a/arraycontext/impl/pytato/utils.py b/arraycontext/impl/pytato/utils.py
@@ -99,6 +99,7 @@ def _normalize_pt_expr(
     """
     normalize_mapper = _DatawrapperToBoundPlaceholderMapper()
     normalized_expr = normalize_mapper(expr)
+    assert isinstance(normalized_expr, AbstractResultWithNamedArrays)
     return normalized_expr, normalize_mapper.bound_arguments
 
 
