Update app.py

app.py

@@ -1,4 +1,5 @@
 
+import os
 import gradio as gr
 import torch
 from torchvision import models, transforms
@@ -9,7 +10,7 @@ TORCH_VERSION = ".".join(torch.__version__.split(".")[:2])
 CUDA_VERSION = torch.__version__.split("+")[-1]
 
 # -- install pre-build detectron2
-!python -m pip install detectron2 -f https://dl.fbaipublicfiles.com/detectron2/wheels/{CUDA_VERSION}/{TORCH_VERSION}/index.html
+os.system(pip install detectron2 -f https://dl.fbaipublicfiles.com/detectron2/wheels/{CUDA_VERSION}/{TORCH_VERSION}/index.html)
 
 import detectron2
 from detectron2.utils.logger import setup_logger # ????