Fix #15567. collections.deque wasn't imported
diff --git a/Lib/threading.py b/Lib/threading.py
index 2290855..db9ab29 100644
--- a/Lib/threading.py
+++ b/Lib/threading.py
@@ -10,6 +10,7 @@
import warnings
+from collections import deque as _deque
from time import time as _time, sleep as _sleep
from traceback import format_exc as _format_exc
@@ -913,7 +914,7 @@
self.rc = Condition(self.mon)
self.wc = Condition(self.mon)
self.limit = limit
- self.queue = deque()
+ self.queue = _deque()
def put(self, item):
self.mon.acquire()