Chain operations, avoid using name result

Author: Marco Gorelli

pandas/core/frame.py

@@ -6260,12 +6260,10 @@ def explode(self, column: Union[str, Tuple]) -> "DataFrame":
             raise ValueError("columns must be unique")
 
         df = self.reset_index(drop=True)
-        result = df[column].explode()
-        result = df.drop([column], axis=1).join(result)
-        result.index = self.index.take(result.index)
-        result = result.reindex(columns=self.columns, copy=False)
-
-        return result
+        df = df.drop([column], axis=1).join(df[column].explode())
+        return df.set_index(self.index.take(df.index)).reindex(
+            columns=self.columns, copy=False
+        )
 
     def unstack(self, level=-1, fill_value=None):
         """