feedback: invalidate_string_dtype

arw2019 · arw2019 · commit 5324a05b2a5e · 2020-10-11T20:46:49.000Z
diff --git a/pandas/core/dtypes/cast.py b/pandas/core/dtypes/cast.py
@@ -939,7 +939,7 @@ def maybe_upcast(
     return values, fill_value
 
 
-def invalidate_string_dtypes(dtype_set: Set):
+def invalidate_string_dtypes(dtype_set: Set[DtypeObj]):
     """
     Change string like dtypes to object for
     ``DataFrame.select_dtypes()``.
