Update to support renaming of LuaLock to Lock in redis-py (#214)

* redis-py renamed LuaLock to lock

* redis-py renamed LuaLock to Lock

Author: kraptor

mrq/agent.py

@@ -8,7 +8,12 @@
 import traceback
 from collections import defaultdict
 from bson import ObjectId
-from redis.lock import LuaLock
+
+try:
+    from redis.lock import LuaLock
+except ImportError:
+    from redis.lock import Lock
+    
 from .processes import Process, ProcessPool
 from .utils import MovingETA, normalize_command
 from .queue import Queue

mrq/worker.py

@@ -15,7 +15,12 @@
 import json as json_stdlib
 import ujson as json
 from bson import ObjectId
-from redis.lock import LuaLock
+
+try:
+    from redis.lock import LuaLock
+except ImportError:
+    from redis.lock import Lock
+    
 from collections import defaultdict
 from mrq.utils import load_class_by_path