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-rw-r--r--lib/Crypto/Cipher/blockalgo.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Crypto/Cipher/blockalgo.py b/lib/Crypto/Cipher/blockalgo.py
index 8863a7d..8619a8a 100644
--- a/lib/Crypto/Cipher/blockalgo.py
+++ b/lib/Crypto/Cipher/blockalgo.py
@@ -21,7 +21,9 @@
# ===================================================================
"""Module with definitions common to all block ciphers."""
-from Crypto.Util.py21compat import *
+import sys
+if sys.version_info[0] == 2 and sys.version_info[1] == 1:
+ from Crypto.Util.py21compat import *
from Crypto.Util.py3compat import *
#: *Electronic Code Book (ECB)*.