Update app.py

app.py

@@ -12,7 +12,7 @@ from transformers import AutoTokenizer, AutoModelForCausalLM, AutoConfig, AutoPr
 from transformers import TextIteratorStreamer
 import torch
 from dc.model import *
-from dc.constants import DEFAULT_IMAGE_PATCH_TOKEN, DEFAULT_IM_START_TOKEN, DEFAULT_IM_END_TOKEN
+from dc.constants import IMAGE_TOKEN_INDEX, DEFAULT_IMAGE_TOKEN, DEFAULT_IM_START_TOKEN, DEFAULT_IM_END_TOKEN
 from dc.conversation import conv_templates, SeparatorStyle
 from PIL import Image