update app.py

app.py

@@ -1,9 +1,19 @@
 import gradio as gr
 from transformers import AutoTokenizer, AutoModel
 
-def chat(text):
+def chat(prompt):
+
     global model, tokenizer
-    response, history = model.chat(tokenizer, text, "", 64, 0.7, 0.95)
+    response, history = model.chat(tokenizer,
+                                   prompt,
+                                   history=None,
+                                   max_length=64,
+                                   top_p=0.7,
+                                   temperature=0.95,
+                                   num_beam_groups=1,
+                                   num_beams=2
+                                   )
+
     return response