python-nose: assertion library?

Question

Is there a library which of nose-friendly assertions things like membership and identity (eg, assert_contains(x, y), assert_is(a, b))?

Answer 1

Nose provides stand-alone versions of the stdlib assertions:

from nose.tools import assert_in, assert_is

For older Pythons, the unittest2 versions can likely be wrapped using a technique similar to what's in tools.py.