Update Mimic4Dataset.py

Mimic4Dataset.py

@@ -405,9 +405,13 @@ class Mimic4Dataset(datasets.GeneratorBasedBuilder):
         val_data.to_csv(csv_dir+'/val_data.csv',index=False)
         test_data.to_csv(csv_dir+'/test_data.csv',index=False)
 
-        train_data.to_pickle(csv_dir+'/train_data.pkl')
-        val_data.to_pickle(csv_dir+'/val_data.pkl')
-        test_data.to_pickle(csv_dir+'/test_data.pkl')
+        train_dic = train_data.to_dict('index')
+        test_dic = test_data.to_dict('index')
+        val_dic = val_data.to_dict('index')
+        
+        train_dic.to_pickle(csv_dir+'/train_data.pkl')
+        val_dic.to_pickle(csv_dir+'/val_data.pkl')
+        test_dic.to_pickle(csv_dir+'/test_data.pkl')
         
         return feat_cond, feat_chart, feat_proc, feat_meds, feat_out