text: from __future__ import absolute_import
  from __future__ import print_function
  
  from argparse import ArgumentParser
  import datetime
  import pytz
  from typing import Any
  
  from django.core.management.base import BaseCommand
  from zerver.models import UserProfile, Realm, Stream, Message, get_realm
  from six.moves import range
  
  class Command(BaseCommand):
      help = "Generate statistics on user activity."
  
      def add_arguments(self, parser):
          # type: (ArgumentParser) -> None
          parser.add_argument('realms', metavar='<realm>', type=str, nargs='*',
                              help="realm to generate statistics for")
  
      def messages_sent_by(self, user, week):
          # type: (UserProfile, int) -> int
          start = datetime.datetime.now(tz=pytz.utc) - datetime.timedelta(days=(week + 1)*7)
          end = datetime.datetime.now(tz=pytz.utc) - datetime.timedelta(days=week*7)
          return Message.objects.filter(sender=user, pub_date__gt=start, pub_date__lte=end).count()
  
      def handle(self, *args, **options):
          # type: (*Any, **Any) -> None
          if options['realms']:
              try:
                  realms = [get_realm(string_id) for string_id in options['realms']]
              except Realm.DoesNotExist as e:
                  print(e)
                  exit(1)
          else:
              realms = Realm.objects.all()
  
          for realm in realms:
              print(realm.string_id)
              user_profiles = UserProfile.objects.filter(realm=realm, is_active=True)
              print("%d users" % (len(user_profiles),))
              print("%d streams" % (len(Stream.objects.filter(realm=realm)),))
  
              for user_profile in user_profiles:
                  print("%35s" % (user_profile.email,), end=' ')
                  for week in range(10):
                      print("%5d" % (self.messages_sent_by(user_profile, week)), end=' ')
                  print("")
  