Update trans_web_demo.py

当设置prompt的时候跳过一轮

basic_demo/trans_web_demo.py

@@ -105,6 +105,8 @@ def predict(history, prompt, max_length, top_p, temperature):
     if prompt:
         messages.append({"role": "system", "content": prompt})
     for idx, (user_msg, model_msg) in enumerate(history):
+        if prompt and idx == 0:
+            continue
         if idx == len(history) - 1 and not model_msg:
             messages.append({"role": "user", "content": user_msg})
             break
@@ -173,4 +175,4 @@ with gr.Blocks() as demo:
     emptyBtn.click(lambda: (None, None), None, [chatbot, prompt_input], queue=False)
 
 demo.queue()
-demo.launch(server_name="127.0.0.1", server_port=8000, inbrowser=True, share=True)
+demo.launch(server_name="127.0.0.1", server_port=8000, inbrowser=True, share=True)