def foo(foo):
    return_dict: dict = {
        "status": "invalid",
        "error": "loquesea",
        "csv": {
            "headers": ["student", "corrects", "incorrects"],
            "contents": [
                ["pepito", "10", "34"],

            ]
        }
    }
    data = json.loads(request.data)
    if data.get("test"):
        test: Test = context.query_first(Test, Test.id == data.get("test"))
        if test:

            for test_instance in test.test_instances:

                for result in test_instance.results:
                    f"{test_instance.student}
                [
                    [1, 1],
                    [2, 0],
                    [3, 1],
                    [4, 1]
                ]

    return return_dict