Update pandas.py (#473)

casact · Nov 18, 2023 · ac3fa37 · ac3fa37
1 parent cbff0a8
commit ac3fa37
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/chainladder/core/pandas.py b/chainladder/core/pandas.py
@@ -411,7 +411,7 @@ def aggregate(i, obj, axis, v):
                 for i in self.groups.indices.values()
             ]
         obj = concat(values, axis=self.axis, ignore_index=True)
-        group_index = pd.Index(self.groups.keys())
+        group_index = self.groups.first().index
         if self.axis == 0:
             if isinstance(group_index, pd.MultiIndex):
                 index = (