fix: sanity check message pairs in the post process

app.py

@@ -402,6 +402,12 @@ class Chatbot(gr.Chatbot):
             return []
         processed_messages = []
         for message_pair in y:
+            result = ""
+            print('Message Pairs: ',message_pair[0],message_pair[1])
+            if message_pair[0] is not None:
+                result += message_pair[0]
+            if message_pair[1] is not None:
+                result += message_pair[1]
             if not isinstance(message_pair, (tuple, list)):
                 raise TypeError(
                     f"Expected a list of lists or list of tuples. Received: {message_pair}"
@@ -412,7 +418,7 @@ class Chatbot(gr.Chatbot):
                 )
             processed_messages.append(
                 [
-                    None,self._postprocess_chat_messages((message_pair[0]+message_pair[1]).replace(';','\n').replace('\\','\t'))
+                    None,self._postprocess_chat_messages((result).replace(';','\n').replace('\\','\t'))
                     #self._postprocess_chat_messages(message_pair[1])),
                 ]
             )