new_contents: from collections import namedtuple
  
  
  ProblemIdsReport = namedtuple('ProblemIdsReport', ['db_name', 'uri', 'problem_ids',
                                                     'final_attempt', 'include_email',
                                                     'start_date', 'end_date',
                                                     'output_directory', 'row_limit',
                                                     'anonymize', 'display_names'])
  
  SendEmail = namedtuple('SendEmail', ['from_address', 'from_name', 'password',
                                       'to_address', 'body', 'subject', 'attachments'])
  
subject: Define attribute holder classes