add print answer

app.py

@@ -150,7 +150,9 @@ def chat(img, msgs, ctx, params=None, vision_hidden_states=None):
             res = res.replace('</ref>', '')
             res = res.replace('<box>', '')
             answer = res.replace('</box>', '')
+        print('answer:')
         for char in answer:
+            print(char, flush=True, end='')
             yield char
     except Exception as e:
         print(e)