moved download buttons to separate file

stand.py

@@ -3,9 +3,10 @@ import streamlit as st
 import hacks
 
 from aggrid import aggrid
+from download import download
 from restapi import restapi
 from utils.st_utils import get_session_id, rerun, hide_UI_elements
-from utils.df_utils import to_excel_binary
+
 
 
 st.set_page_config(
@@ -28,31 +29,7 @@ df = restapi.data
 print(">>> start of streamlit run")
 
 
-
-showing_downloads = st.session_state.get("showing_downloads", False)
-
-col1, col2, col3, col4 = st.columns([1, 1, 1, 1])
-with col1:
-    if st.button("Downloads") and not showing_downloads:
-        st.session_state.showing_downloads = True
-
-        with col2:
-            with open("output.h5", "rb") as f:
-               st.download_button("📥 hdf5", f, file_name="output.h5")
-
-        with col3:
-            xlsx = to_excel_binary(df)
-            st.download_button("📥 xlsx", xlsx, file_name="output.xlsx")
-
-        with col4:
-            csv = df.to_csv()
-            st.download_button("📥 csv", csv, file_name="output.csv")
-
-#        st.stop()
-
-    else:
-        st.session_state.showing_downloads = False
-
+download(df)
 
 
 response = aggrid(