input: Write a function to find out the number of days in a given year between two dates.
  assert find_days('04/10/2019', '10/11/2020') == 403
  assert find_days('01/01/2020', '31/12/2020') == 365
  assert find_days('15/06/2021', '15/06/2022') == 365
output: def find_days(date1, date2):
      from datetime import datetime
  
      date_format = "%d/%m/%Y"
      start_date = datetime.strptime(date1, date_format)
      end_date = datetime.strptime(date2, date_format)
      
      return (end_date - start_date).days