old_contents: # -*- coding: utf-8 -*-
  import getpass
  
  from django.contrib.auth import get_user_model
  from django.core.management.base import BaseCommand, CommandError
  
  from django_extensions.management.utils import signalcommand
  
  
  class Command(BaseCommand):
      help = "Clone of the UNIX program ``passwd'', for django.contrib.auth."
  
      requires_system_checks = False
  
      @signalcommand
      def handle(self, *args, **options):
          if len(args) > 1:
              raise CommandError("need exactly one or zero arguments for username")
  
          if args:
              username, = args
          else:
              username = getpass.getuser()
  
          User = get_user_model()
          try:
              u = User.objects.get(username=username)
          except User.DoesNotExist:
              raise CommandError("user %s does not exist" % username)
  
          print("Changing password for user: %s" % u.username)
          p1 = p2 = ""
          while "" in (p1, p2) or p1 != p2:
              p1 = getpass.getpass()
              p2 = getpass.getpass("Password (again): ")
              if p1 != p2:
                  print("Passwords do not match, try again")
              elif "" in (p1, p2):
                  raise CommandError("aborted")
  
          u.set_password(p1)
          u.save()
  
          return "Password changed successfully for user %s\n" % u.username
  
new_contents: # -*- coding: utf-8 -*-
  import getpass
  
  from django.contrib.auth import get_user_model
  from django.core.management.base import BaseCommand, CommandError
  
  from django_extensions.management.utils import signalcommand
  
  
  class Command(BaseCommand):
      help = "Clone of the UNIX program ``passwd'', for django.contrib.auth."
  
      requires_system_checks = False
  
      def add_arguments(self, parser):
          parser.add_argument('username', nargs='?', type=str)
  
      @signalcommand
      def handle(self, *args, **options):
          username = options['username'] or getpass.getuser()
  
          User = get_user_model()
          try:
              u = User.objects.get_by_natural_key(username)
          except User.DoesNotExist:
              raise CommandError("user %s does not exist" % username)
  
          print("Changing password for user: %s" % username)
          p1 = p2 = ""
          while "" in (p1, p2) or p1 != p2:
              p1 = getpass.getpass()
              p2 = getpass.getpass("Password (again): ")
              if p1 != p2:
                  print("Passwords do not match, try again")
              elif "" in (p1, p2):
                  raise CommandError("aborted")
  
          u.set_password(p1)
          u.save()
  
          return "Password changed successfully for user %s\n" % username
  
subject: Update passwd command up to Django>=1.8