<s> import sys <EOL> if sys . version_info >= ( <NUM_LIT:2> , <NUM_LIT:7> ) : <EOL> import unittest <EOL> else : <EOL> from django . utils import unittest <EOL> try : <EOL> from django . utils . encoding import force_str <EOL> except ImportError : <EOL> from django . utils . encoding import force_unicode as force_str </s>
