Update app.py

app.py

@@ -75,7 +75,11 @@ def main():
         st.warning("Please enter your OpenAI API key.")
 
 # Function to calculate late interest
+
 def calculate_late_interest(data, late_interest_rate, boe_rates_df):
+    # Convert due_date column to Timestamp objects
+    data['due_date'] = pd.to_datetime(data['due_date'])
+
     # Calculate late days and late interest
     data['late_days'] = (data['payment_date'] - data['due_date']).dt.days.clip(lower=0)
     data['late_interest'] = data['late_days'] * data['amount'] * (late_interest_rate / 100)
@@ -86,6 +90,7 @@ def calculate_late_interest(data, late_interest_rate, boe_rates_df):
 
     return data
 
+
 # Function to get Bank of England base rate for a given date
 def get_boe_base_rate(date, boe_rates_df):
     closest_date = boe_rates_df['Date Changed'].iloc[(boe_rates_df['Date Changed']-date).abs().argsort()[0]]