code: def _get_expiration_date(cert):
      '''
      Returns a datetime.datetime object
      '''
      cert_obj = _read_cert(cert)
  
      if cert_obj is None:
          raise CommandExecutionError(
              'Failed to read cert from {0}, see log for details'.format(cert)
          )
  
      return datetime.strptime(
          salt.utils.stringutils.to_str(cert_obj.get_notAfter()),
          four_digit_year_fmt
      f _get_expiration_date(cert):
      '''
      Returns a datetime.datetime object
      '''
      cert_obj = _read_cert(cert)
  
      if cert_obj is None:
          raise CommandExecutionError(
              'Failed to read cert from {0}, see log for details'.format(cert)
          )
  
      return datetime.strptime(
          salt.utils.stringutils.to_str(cert_obj.get_notAfter()),
          four_digit_year_fmt
      )
docs: Returns a datetime.datetime object