Update app.py

app.py

@@ -162,9 +162,12 @@ if uploaded_file is not None:
     st.session_state.default = 0.0
     
     with col1:
+        def default_theshold():
+            st.session_state.default = 0.0
+        
         # st.markdown("""<style>[data-baseweb="select"] {margin-top: -26px;}</style>""", unsafe_allow_html=True)
         max_scale = int(data.shape[0] // 128)
-        scale = st.selectbox('Scale:',[f"{(i+1)*128}x{(i+1)*128}" for i in range(max_scale)], label_visibility="hidden", on_change=lambda _: st.session_state.default = 0.0)
+        scale = st.selectbox('Scale:',[f"{(i+1)*128}x{(i+1)*128}" for i in range(max_scale)], label_visibility="hidden", on_change=default_threshold)
         scale = int(scale.split("x")[0]) // 128
     
     with col3: