Python - Excel via win32com

import win32com.client
excel = win32com.client.Dispatch("Excel.Application")
excel.DisplayAlerts = False
excel.Visible=False
doc = excel.Workbooks.Open('D:\\Users\\735906\\Downloads\\ticket_FieldService_20190925_055000.xlsb')
doc.SaveAs(Filename="D:\\Users\\735906\\Downloads\\ticket_FieldService_20190925_055000.csv",FileFormat=6)
doc.Close()
excel.Quit()