title: Pytest: Getting addresses of all tests
body: <p>When I run <code>pytest --collect-only</code> to get the list of my tests, I get them in a format like <code>&lt;Function: test_whatever&gt;</code>. However, when I use <code>pytest -k ...</code> to run a specific test, I need to input the "address" of the test in the format <code>foo::test_whatever</code>. Is it possible to get a list of all the addresses of all the tests in the same format that <code>-k</code> takes?</p>