nose.tools also contain methods ok_ and eq_, which function similar to assert and assert_equals respectively.
You can optionally pass an error message that can be displayed when a test fails.
Usage of ok_ and eq_ is shown in below example by defining two functions in sample_test_module.py
from nose.tools import ok_, eq_
def test_using_ok():
ok_(2+3==5)
def test_using_eq():
eq_(2+3, 5)