🐴 work around some useless mypy errors

Author: jorenham

tool/testgen.py

@@ -1167,7 +1167,7 @@ def __init_dtypes(self) -> None:
                 continue
             seen_dtypes.add(label)
 
-            kind = dtype.kind
+            kind: str = dtype.kind
             if kind in "SU":
                 kind = "w"
             if kind in unseen_abstract and label in unseen_abstract[kind]:
@@ -1209,10 +1209,12 @@ def _evaluate(
             lhs, rhs = rhs, lhs
 
         try:
-            return self.opfunc(lhs, rhs).dtype
+            dtype: np.dtype = self.opfunc(lhs, rhs).dtype
         except TypeError:
             return None
 
+        return dtype
+
     def _gen_testcases_np_nd(self, label1: str, /) -> Generator[str | None]:
         name1 = f"{label1}_nd"
         dtypes1 = self.dtypes[label1]