do not convert if not in revit id format

app.py

@@ -27,6 +27,10 @@ def compress(g):
 
 def revit_id_to_guid(sheet, column):
 
+    if not '-' in sheet[column]:
+
+        return sheet[column]
+
     id_components = sheet[column].rsplit('-', 1)
     episode_id = id_components[0]
     element_id = id_components[1]
@@ -133,7 +137,7 @@ st.markdown(
     '''
         # Convert Revit IDs to GUIDs
 
-        Provide any spreadsheet (using a dropbox link) that has a column of revit IDs.
+        Provide any spreadsheet (using a dropbox link) that has a column of revit IDs. A typical Revit IDS is `60f91daf-3dd7-4283-a86d-24137b73f3da-0001fd0b`. The script will convert the ID to '3CPy6r22DAahSW8AIIobik'.
 
 
         Select the sheet witin the spreadsheet and the column with the IDs.
@@ -169,12 +173,12 @@ if tabs:
     )
 
     if selected_sheet:
-        
+
         df = cobie_file.parse(selected_sheet)
 
     if type(df) == pd.DataFrame:
 
-        st.write(df)
+        # st.write(df)
         columns = df.columns
         selected_column = st.selectbox(
             'Select column with revit ids',