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-rw-r--r--lib/Crypto/SelfTest/Random/test__UserFriendlyRNG.py5
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Crypto/SelfTest/Random/test__UserFriendlyRNG.py b/lib/Crypto/SelfTest/Random/test__UserFriendlyRNG.py
index 771a663..3fd7ad4 100644
--- a/lib/Crypto/SelfTest/Random/test__UserFriendlyRNG.py
+++ b/lib/Crypto/SelfTest/Random/test__UserFriendlyRNG.py
@@ -39,6 +39,11 @@ from Crypto.Util.py3compat import *
try:
import multiprocessing
+ # multiprocessing.Pool uses classes from multiprocessing.synchronize, so we
+ # need to check if multiprocessing.semaphore will work. Otherwise creating a
+ # multiprocessing.Pool instance will fail with an ImportError. See Python
+ # bug #3770 for details.
+ import multiprocessing.synchronize
except ImportError:
multiprocessing = None