Update app.py

app.py

@@ -31,7 +31,7 @@ def main():
             late_interest_rate = st.number_input("Enter Late Interest Rate (%):", min_value=0.0, max_value=100.0, step=0.1)
 
             # Calculate late interest if due dates and payment dates are available
-            if due_dates and payment_dates:
+            if not due_dates.empty and not payment_dates.empty:
                 # Create DataFrame with extracted due dates, payment dates, and placeholder amount
                 df_calculate = pd.DataFrame({
                     'due_date': due_dates,