old_contents: # flake8: noqa
  from .generic import (_make_pseudo_id, get_pseudo_id, makedirs, fix_bill_id, DatetimeValidator,
                        JSONEncoderPlus, convert_pdf, utcnow, format_datetime)
  
new_contents: # flake8: noqa
  from .generic import (_make_pseudo_id, get_pseudo_id, makedirs, fix_bill_id,
                        JSONEncoderPlus, convert_pdf, utcnow, format_datetime)
  
subject: fix base importer