Update app.py

app.py

@@ -10,8 +10,8 @@ from PIL import Image
 #CUDA_VERSION = torch.__version__.split("+")[-1]
 
 # -- install pre-build detectron2
-os.system(pip install detectron2 -f https://dl.fbaipublicfiles.com/detectron2/wheels/cpu/torch1.10/index.html)
-os.system(pip install pyyaml==5.1)
+os.system('pip install detectron2 -f https://dl.fbaipublicfiles.com/detectron2/wheels/cpu/torch1.10/index.html')
+os.system('pip install pyyaml==5.1')
 
 import detectron2
 from detectron2.utils.logger import setup_logger # ????