Specifying a specific parametrization of a test

[1p1e3]

hello teachers，i'm a beginner，i'm reading the documentation for pytest，i'm learning how to invoke pytest，
i have no idea about "Specifying a specific parametrization of a test"，i don't know how to use it，can you provide me with a simple usage example? thank you very much！🫡🫡🫡

[The-Compiler]

You might want to read more about parametrizing test functions in order to understand that example.

Based on that, imagine a test_mod.py like

import pytest

@pytest.mark.parametrize("a, b", [("x1", "y2"), ("v3", "w4")])
def test_func(a, b):
    ...

which will result in two test cases:

test_mod.py::test_func[x1-y2]
test_mod.py::test_func[v3-w4]

and the shown invocation will run the first one only.