chat-completion-input has to be string format

hf2llamastack.py

@@ -2,6 +2,7 @@ from datasets import load_dataset, DatasetDict, Dataset
 import os
 import textwrap
 import random
+import json
 
 OUTPUT_DATASET_NAME = "teddyyyy123/gpqa_0shot_cot"
 
@@ -60,12 +61,14 @@ def convert_to_llamastack_format(ds):
 
         # must use the df.loc syntax, directly assigning to row['key'] won't keep it
         df.loc[idx, 'input_query'] = row['Question']
-        df.loc[idx, 'chat_completion_input'] = [{
-            'role':'user', 'content':[{
-                'type':'text',
-                'text': COT_PROMPT_TEMPATE.format(row['Question'], *shuffled_choices)
-                }]
-        }]
+        df.loc[idx, 'chat_completion_input'] = json.dumps(
+            [{
+                'role':'user', 'content':[{
+                    'type':'text',
+                    'text': COT_PROMPT_TEMPATE.format(row['Question'], *shuffled_choices)
+                    }]
+            }]
+        )
         df.loc[idx, 'expected_answer'] = shuffled_target_letter
     return Dataset.from_pandas(df)