Update app.py

app.py

@@ -9,11 +9,11 @@ import requests
 from PIL import Image
 
 try:
-    import python3.1-dev
+    import python3-dev
     import super-gradients
 except ImportError:
     os.system("pip install -e .")
-    import python3.1-dev
+    import python3-dev
     import super-gradients
 from super_gradients.common.object_names import Models
 from super_gradients.training import models