Update app.py

app.py

@@ -12,8 +12,9 @@ from PIL import Image
 # -- install pre-build detectron2
 os.system('pip install git+https://github.com/facebookresearch/detectron2.git')
 os.system('pip install pyyaml==5.1')
-'''
+
 import detectron2
+'''
 from detectron2.utils.logger import setup_logger # ????
 
 from detectron2 import model_zoo