Why isn't assertRaises catching my Attribute Error using python unittest?

Question

I\'m trying to run this test: self.assertRaises(AttributeError, branch[0].childrennodes), and branch[0] does not have an attribute childrenno

Answer 1

pytest also has a similar decorator:

from pytest import raises

def test_raising():
    with raises(AttributeError):
        branch[0].childrennodes