Use python3 range.

Including potential memory reduction due to not created unnecessary lists.

evennia/commands/command.py

@@ -4,6 +4,7 @@ The base Command class.
 All commands in Evennia inherit from the 'Command' class in this module.
 
 """
+from builtins import range
 
 import re
 from evennia.locks.lockhandler import LockHandler

evennia/commands/default/batchprocess.py

@@ -17,6 +17,8 @@ the Evennia API.  It is also a severe security risk and should
 therefore always be limited to superusers only.
 
 """
+from builtins import range
+
 from traceback import format_exc
 from django.conf import settings
 from evennia.utils.batchprocessors import BATCHCMD, BATCHCODE

evennia/commands/default/building.py

@@ -4,6 +4,8 @@ import sys
 Building and world design commands
 
 """
+from builtins import range
+
 import re
 from django.conf import settings
 from django.db.models import Q

evennia/commands/default/player.py

@@ -19,6 +19,8 @@ self.msg() and similar methods to reroute returns to the correct
 method. Otherwise all text will be returned to all connected sessions.
 
 """
+from builtins import range
+
 import time
 from django.conf import settings
 from evennia.server.sessionhandler import SESSIONS