propogating cahnges

app.py

@@ -79,12 +79,12 @@ else:
     # LOAD AND CACHE THE IMAGE
     if uploaded_image is not None:
         image = uploaded_image
-    elif select_idx is None:
-        image = st.session_state.image
+    elif select_idx is None and 'image' in st.session_state:
+        image = st.session_state['image']
     else:
         image = Image.open(image_file)
     
-    st.session_state.image = image
+    st.session_state['image'] = image
     
     image_dict = imageLoader.transform(image)