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-rw-r--r--src/test/ope_ref.py7
1 files changed, 6 insertions, 1 deletions
diff --git a/src/test/ope_ref.py b/src/test/ope_ref.py
index f9bd97c546..61a86b57bb 100644
--- a/src/test/ope_ref.py
+++ b/src/test/ope_ref.py
@@ -1,9 +1,14 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
# Copyright 2018-2019, The Tor Project, Inc. See LICENSE for licensing info.
# Reference implementation for our rudimentary OPE code, used to
# generate test vectors. See crypto_ope.c for more details.
+# Future imports for Python 2.7, mandatory in 3.0
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from cryptography.hazmat.primitives.ciphers.algorithms import AES
from cryptography.hazmat.backends import default_backend