mypy add type: ignore[assignment]

Author: topper-123

pandas/core/reshape/pivot.py

@@ -98,7 +98,7 @@ def pivot_table(
         values = list(values)
 
     grouped = data.groupby(keys, observed=observed)
-    agged = grouped.agg(aggfunc)
+    agged: DataFrame = grouped.agg(aggfunc)
     if dropna and isinstance(agged, ABCDataFrame) and len(agged.columns):
         agged = agged.dropna(how="all")
 
@@ -148,9 +148,8 @@ def pivot_table(
         table = table.sort_index(axis=1)
 
     if fill_value is not None:
-        filled = table.fillna(value=fill_value, downcast="infer")
-        assert filled is not None  # needed for mypy
-        table = filled
+        table = table.fillna(fill_value, downcast="infer")  # type: ignore[assignment]
+        assert isinstance(table, DataFrame)
 
     if margins:
         if dropna: