Issue #22853: Fixed a deadlock when use multiprocessing.Queue at import time.
Patch by Florian Finkernagel and Davin Potts.
diff --git a/Lib/multiprocessing/queues.py b/Lib/multiprocessing/queues.py
index 433c7e2..487e0af 100644
--- a/Lib/multiprocessing/queues.py
+++ b/Lib/multiprocessing/queues.py
@@ -44,10 +44,10 @@
from Queue import Empty, Full
import _multiprocessing
-from multiprocessing import Pipe
-from multiprocessing.synchronize import Lock, BoundedSemaphore, Semaphore, Condition
-from multiprocessing.util import debug, info, Finalize, register_after_fork
-from multiprocessing.forking import assert_spawning
+from . import Pipe
+from .synchronize import Lock, BoundedSemaphore, Semaphore, Condition
+from .util import debug, info, Finalize, register_after_fork, is_exiting
+from .forking import assert_spawning
#
# Queue type using a pipe, buffer and thread
@@ -229,8 +229,6 @@
@staticmethod
def _feed(buffer, notempty, send, writelock, close):
debug('starting thread to feed data to pipe')
- from .util import is_exiting
-
nacquire = notempty.acquire
nrelease = notempty.release
nwait = notempty.wait