# Check if output file already exists
if os.path.exists(output_file):
    book = openpyxl.load_workbook(output_file)

    if "Input_Data" in book.sheetnames:
        ws = book["Input_Data"]
        
        # Clear the entire contents of the sheet
        for row in ws:
            for cell in row:
                cell.value = None
                
    with pd.ExcelWriter(output_file, engine='openpyxl') as writer:
        writer.book = book
        writer.sheets = {ws.title: ws for ws in book.worksheets}
        final_df.to_excel(writer, sheet_name="Input_Data", index=False, startrow=0, startcol=0)

else:  # If the output file doesn't exist, create it
    final_df.to_excel(output_file, sheet_name="Input_Data", index=False, engine='openpyxl')