Update app.py

app.py

@@ -82,6 +82,14 @@ def main():
         st.write("Sample Data:")
         st.dataframe(sample_data)
 
+        # Debug: Show column names
+        st.write("Columns in uploaded data:", sample_data.columns)
+
+        # Ensure the column names are correct
+        if 'Parameter' not in sample_data.columns or 'Value' not in sample_data.columns:
+            st.error("The uploaded file must contain 'Parameter' and 'Value' columns.")
+            return
+
         # Load water quality standards (to be replaced with your data)
         standards = {
             "Lead": 0.01,