Update utils.py

utils.py

@@ -24,11 +24,11 @@ def read_file_json(file_path):
 
     df = None
 
-    if ext == ".csv":
+    if is_ext(file_path, "csv"):
         df = pd.read_csv(file_path)
-    elif ext in (".xls", ".xlsx"):
+    elif is_ext(file_path, "xls") or is_ext(file_path, "xlsx"):
         df = pd.read_excel(file_path)
-    elif ext in (".json", ".jsonl"):
+    elif is_ext(file_path, "json") or is_ext(file_path, "jsonl"):
         df = pd.read_json(file_path)
 
     return "" if df is None else df.to_json()