Update ex_app.py

ex_app.py

@@ -49,7 +49,7 @@ if uploaded_file is not None:
     run = st.button('Generate Art')
     my_bar = st.progress(0)
     params = neural_style.TransferParams()
-    params.gpu = "c"
+    params.gpu = 0#"c"
     params.backend = "mkl"
     params.image_size = 400
     params.content_image = uploaded_file