Standardize __future__ imports

nacl/__init__.py

+from __future__ import absolute_import
+from __future__ import division
+from __future__ import unicode_literals
+
 from . import __about__
 from . import hash  # pylint: disable=W0622
 from .random import random

nacl/exceptions.py

+from __future__ import absolute_import
+from __future__ import division
+from __future__ import unicode_literals
+
+
 class CryptoError(Exception):
     """
     Base exception for all nacl related errors

nacl/hash.py

+from __future__ import absolute_import
+from __future__ import division
+from __future__ import unicode_literals
+
 import binascii
 
 from . import nacl

nacl/nacl.py

 """
 CFFI interface to NaCl and libsodium library
 """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import unicode_literals
+
 import functools
 
 from cffi import FFI

nacl/random.py

+from __future__ import absolute_import
+from __future__ import division
+from __future__ import unicode_literals
+
 from . import nacl