duplicated columns in df are removed now

rdstar/studies/low_level_cut_study/low_level_cut_study.py

@@ -74,7 +74,9 @@ class MergeNTuplesTask(utilities.BaseOfflineTask):
                 assert os.path.splitext(p=self.input_dict[combo])[1] == ".root", os.path.splitext(p=self.input_dict[combo])
                 data_file = uproot.open(self.input_dict[combo])
                 tree = data_file[data_file.keys()[0]]
-                dfs.append(tree.pandas.df())
+                df = tree.pandas.df()
+                df = df.loc[:, ~df.columns.duplicated()]
+                dfs.append(df)
                 number_of_events += len(dfs[-1].index)
 
             total_n_tuple = pd.concat(dfs, ignore_index=True, sort=False)