old_contents: from django.core.management.base import BaseCommand
  from recommends.tasks import recommends_precompute
  
  from datetime import datetime
  import dateutil.relativedelta
  from optparse import make_option
  
  import warnings
  
  
  class Command(BaseCommand):
      help = 'Calculate recommendations and similarities based on ratings'
      option_list = BaseCommand.option_list + (
          make_option('--verbose',
              action='store_true',
              dest='verbose',
              default=False,
              help='verbose mode'
          ),
      )
  
      def handle(self, *args, **options):
          verbosity = int(options.get('verbosity', 0))
          if options['verbose']:
              warnings.warn('The `--verbose` option is being deprecated and it will be removed in the next release. Use `--verbosity` instead.', PendingDeprecationWarning)
              verbosity = 1
  
          if verbosity == 0:
              # avoids allocating the results
              recommends_precompute()
          else:
              self.stdout.write("\nCalculation Started.\n")
              start_time = datetime.now()
              results = recommends_precompute()
              end_time = datetime.now()
              if verbosity > 1:
                  for r in results:
                      self.stdout.write(
                          "%d similarities and %d recommendations saved.\n"
                          % (r['similar_count'], r['recommend_count']))
              rd = dateutil.relativedelta.relativedelta(end_time, start_time)
              self.stdout.write(
                  "Calculation finished in %d years, %d months, %d days, %d hours, %d minutes and %d seconds\n"
                  % (rd.years, rd.months, rd.days, rd.hours, rd.minutes, rd.seconds))
  
new_contents: from django.core.management.base import BaseCommand
  from recommends.tasks import recommends_precompute
  
  from datetime import datetime
  import dateutil.relativedelta
  
  import warnings
  
  
  class Command(BaseCommand):
      help = 'Calculate recommendations and similarities based on ratings'
  
      def add_arguments(self, parser):
          parser.add_argument('--verbose',
                              action='store_true',
                              dest='verbose',
                              default=False,
                              help='verbose mode')
  
      def handle(self, *args, **options):
          verbosity = int(options.get('verbosity', 0))
          if options['verbose']:
              warnings.warn('The `--verbose` option is being deprecated and it will be removed in the next release. Use `--verbosity` instead.', PendingDeprecationWarning)
              verbosity = 1
  
          if verbosity == 0:
              # avoids allocating the results
              recommends_precompute()
          else:
              self.stdout.write("\nCalculation Started.\n")
              start_time = datetime.now()
              results = recommends_precompute()
              end_time = datetime.now()
              if verbosity > 1:
                  for r in results:
                      self.stdout.write(
                          "%d similarities and %d recommendations saved.\n"
                          % (r['similar_count'], r['recommend_count']))
              rd = dateutil.relativedelta.relativedelta(end_time, start_time)
              self.stdout.write(
                  "Calculation finished in %d years, %d months, %d days, %d hours, %d minutes and %d seconds\n"
                  % (rd.years, rd.months, rd.days, rd.hours, rd.minutes, rd.seconds))
  
subject: Change deprecated options_list to add_arguments