pytest Fixture Error: 'nn' not found - Solution and Explanation

This error message suggests that the fixture 'nn' is not defined in the current testing environment.

To resolve this issue, you need to define the fixture 'nn' in your testing file or import it from another file where it is defined.

Here's an example of how you can define a fixture in pytest:

import pytest

@pytest.fixture
def nn():
    # define the fixture here
    return nn_object # replace with your fixture object

You can then use this fixture in your test function by passing it as an argument:

def test_my_function(nn):
    # use the nn fixture here
    ...

Make sure to also check that the fixture is spelled correctly in the test function where it is used.