Update app.py

app.py

@@ -7,5 +7,12 @@ xl2 = st.file_uploader("Choose second file", key="xl2")
 if xl1 is not None and xl2 is not None:
   #assert that the first few columns are the same
   df1 = pd.read_excel(xl1, sheet_name= "0.85 Threshold")
-  #pandas.testing.assert_frame_equal
+  df2 = pd.read_excel(xl2, sheet_name= "0.85 Threshold")
+  try:
+    pandas.testing.assert_frame_equal(df1[["Attendee A","Attendee B","KP"]], df1[["Attendee A","Attendee B","KP"]])
+  except AssertionError as e:
+    st.write("The files' attendees and KPs don't match!")
+    xl1 = None
+    xl2 = None
+    break
   st.write(pd.read_excel(xl1, sheet_name= "0.85 Threshold"))