update generate_prompt

app.py

@@ -13,7 +13,6 @@ pipeline = PIPELINE(model, "rwkv_vocab_v20230424")
 
 
 def generate_prompt(instruction, input=None, history=None):
-    has_history = (history is not None)
     if instruction:
         instruction = (
             instruction.strip()
@@ -21,10 +20,10 @@ def generate_prompt(instruction, input=None, history=None):
             .replace("\n\n", "\n")
             .replace("\n\n", "\n")
         )
-    if has_history:
+    if (history is not None) and len(history) > 1:
         input = "\""
         for pair in history:
-            if len(pair[0]) > 0 and len(pair[1]) > 0:
+            if pair[0] is not None and pair[1] is not None:
                 input += f"User: {pair[0]}\nAssistant: {pair[1]}\n"
         input = input[:-1] + "\"\n" + f"User: {instruction}"
         instruction = "Based on the Conversation History, generate a Response for the User."