Update app.py

app.py

@@ -1,8 +1,11 @@
 """The following program will read in 2 XL sheets of KP matches and the user will evaluate the quality of the matching"""
 import streamlit as st
 import pandas as pd
-xl1 = st.file_uploader("Choose a file")
-xl2 = st.file_uploader("Choose a file")
+xl1 = st.file_uploader("Choose first file", key="xl1")
+xl2 = st.file_uploader("Choose second file", key="xl2")
 
-if xl1 is not None:
+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
   st.write(pd.read_excel(xl1, sheet_name= "0.85 Threshold"))