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-rw-r--r--synapse/util/async.py6
1 files changed, 4 insertions, 2 deletions
diff --git a/synapse/util/async.py b/synapse/util/async.py
index 1df5c5600c..cb53c31123 100644
--- a/synapse/util/async.py
+++ b/synapse/util/async.py
@@ -27,6 +27,8 @@ from contextlib import contextmanager
 
 import logging
 
+from six.moves import range
+
 logger = logging.getLogger(__name__)
 
 
@@ -158,13 +160,13 @@ def concurrently_execute(func, args, limit):
     def _concurrently_execute_inner():
         try:
             while True:
-                yield func(it.next())
+                yield func(next(it))
         except StopIteration:
             pass
 
     return logcontext.make_deferred_yieldable(defer.gatherResults([
         preserve_fn(_concurrently_execute_inner)()
-        for _ in xrange(limit)
+        for _ in range(limit)
     ], consumeErrors=True)).addErrback(unwrapFirstError)