Python nose: assertion library?

Question

Is there a library in which nose-friendly statements include things like membership and identity (e.g. assert_contains(x, y) , assert_is(a, b) )?

Answer 1

Nose provides standalone versions of stdlib statements:

 from nose.tools import assert_in, assert_is 

For older Python versions of unittest2 can be wrapped using techniques similar to those in tools.py.

Answer 2

Stdlib unittest provides both assertIn and assertIs and can be run through the nose. Are you looking for something else? BTW, these methods are only available since python 2.7, and if you want them for an older version of python, it is available from unittest2 package