type selection

app.py

@@ -116,9 +116,14 @@ def download_button(object_to_download, download_filename, button_text, pickle_i
 
 st.markdown(
     '''
-        # COnvert Revit IDs to GUIDs
+        # Convert Revit IDs to GUIDs
+
         Provide any spreadsheet (using a dropbox link) that has a column of revit IDs.
+
+
         Select the sheet witin the spreadsheet and the column with the IDs.
+
+        
         Only the selected sheet will be returned, you can cut and paste the sheet back into the origial spreadsheet.
     '''
 )
@@ -139,7 +144,7 @@ if cobie_file_button:
     cobie_file = pd.ExcelFile(cobie_file_path)
     tabs = cobie_file.sheet_names
 
-
+selected_column = None
 
 if tabs:
     selected_sheet = st.selectbox(
@@ -152,7 +157,27 @@ if tabs:
     if type(df) == pd.DataFrame:
 
         st.write(df)
-
+        columns = df.columns
+        selected_column = st.selectbox(
+            'Select column with revit ids',
+            columns,
+        )
+
+if selected_column:
+
+    # df['COBieGUID'] = df[selected_column].apply(compress)
+
+    st.write(df)
+
+    # st.markdown(
+    #     download_button(
+    #         df,
+    #         'COBieGUIDs.xlsx',
+    #         'Download COBieGUIDs.xlsx',
+    #         pickle_it=False,
+    #     ),
+    #     unsafe_allow_html=True,
+    # )
     # st.markdown(download_button(df, 'COBieIDs.xlsx', 'Download COBieIDs.xlsx'), unsafe_allow_html=True)