fix json_flatten

app.py

@@ -41,7 +41,7 @@ def process_document(image):
     sequence = re.sub(r"<.*?>", "", sequence, count=1).strip()  # remove first task start token
     
     json = processor.token2json(sequence)
-    json_flatten = dict(**json).values()
+    json_flatten = list(dict(**json).values())
     out = ""
     for value in json_flatten:
         out += value + "\n"