Update app.py

app.py

@@ -56,4 +56,12 @@ if uploaded_file is not None:
     elif extype.endswith('.txt'):
         data = conv_txt(extype)
 
-    edited_df = st.data_editor(data)
+    edited_df = st.data_editor(data)
+    
+    columns_to_check = ['Title', 'Source title', 'Author Keywords', 'Keywords Plus']
+
+    for column in columns_to_check:
+        if column in data.columns:
+            print(f"The column '{column}' exists in the DataFrame.")
+        else:
+            print(f"The column '{column}' does not exist in the DataFrame.")