Apply Amaury's patch to multiprocessing for issue 3125, removes the copy_reg and replaces it with ForkingPickler.register(), which should resolve the conflict with the global registry/ctypes
diff --git a/Lib/multiprocessing/managers.py b/Lib/multiprocessing/managers.py
index d322d90..ba5af57 100644
--- a/Lib/multiprocessing/managers.py
+++ b/Lib/multiprocessing/managers.py
@@ -18,13 +18,12 @@
import weakref
import threading
import array
-import copy_reg
import Queue
from traceback import format_exc
from multiprocessing import Process, current_process, active_children, Pool, util, connection
from multiprocessing.process import AuthenticationString
-from multiprocessing.forking import exit, Popen, assert_spawning
+from multiprocessing.forking import exit, Popen, assert_spawning, ForkingPickler
from multiprocessing.util import Finalize, info
try:
@@ -38,7 +37,7 @@
def reduce_array(a):
return array.array, (a.typecode, a.tostring())
-copy_reg.pickle(array.array, reduce_array)
+ForkingPickler.register(array.array, reduce_array)
view_types = [type(getattr({}, name)()) for name in ('items','keys','values')]