Unittest2 on python 2.6

Sun Mar 18 09:31:50 EDT 2012

Suppose we want to use the unittest from Python 2.7, but also want to 
support Python 2.6,
what is the best way to do it?
The solution used now is to have in setup.py
if sys.version < '2.7':
 tests_require.append('unittest2')
and then in every test file
try:
 import unittest2 as unittest
except ImportError:
 import unittest
and it should work just fine, but it's a bit verbose to have this 
try/except dance everywhere..
Any ideas?