Updated system_message handle

app.py

@@ -48,12 +48,12 @@ def infer(
 def respond(
     message,
     history,
-    system_message,
     max_tokens,
     temperature,
     top_p,
 ):
-    messages = [{"role": "system", "content": system_message}]
+    if len(history) == 0 or history[0]['role'] != 'system':
+        messages = [{"role": "system", "content": "You are Softie, a helpful assistant."}]
     for m in history:
         messages.append({"role": m["role"], "content": m["content"]})
     messages.append({"role": "user", "content": message})
@@ -66,7 +66,6 @@ app = ChatInterface(
     respond,
     type="messages",
     additional_inputs=[
-        Textbox(value="You are Softie, a helpful assistant.", label="系统设定"),
         Slider(minimum=1, maximum=2048, value=512, step=1, label="最大生成长度"),
         Slider(minimum=0.01, maximum=4.0, value=0.75, step=0.01, label="温度系数（Temperature）"),
         Slider(minimum=0.01, maximum=1.0, value=0.5, step=0.01, label="核取样系数（Top-p）"),