Update app.py

app.py

@@ -98,7 +98,7 @@ def mode_load(path):
 
 @spaces.GPU()
 def stream_chat(message, history: list, temperature: float, max_length: int, top_p: float, top_k: int, penalty: float):
-    if history.len()==0:
+    if len(history)==0:
         model = AutoModelForCausalLM.from_pretrained(
             MODEL_ID,
             torch_dtype=torch.bfloat16,