7. Most Wanted Letter / Вирішуємо задачі на Python CheckIO Українською

#   ----------     tasks/most_wanted.py   ---------------

LETTERS = "abcdefghijklmnopqrstuvwxyz"


def checkio(text: str) -> str:

    text = text.lower()

    item = "a"
    val = text.count(item)

    for _item in LETTERS:
        _val = text.count(_item)

        if val < _val:
            item = _item
            val = _val

    return item


def checkio_max(text: str) -> str:
    return max(LETTERS, key=text.lower().count)


# --------    tests/test_most_wanted.py   ----------------

import pytest

from tasks.most_wanted import checkio, checkio_max


@pytest.mark.parametrize("func", [checkio, checkio_max])
@pytest.mark.parametrize(["text", "res"], [
    ["Hello World!", "l"],
    ["How do you do?", "o"],
    ["One", "e"],
    ["Oops!", "o"],
    ["AAaooo!!!!", "a"],
    ["abe", "a"],
    ["a" * 9000 + "b" * 1000, "a"],
    ["oooAAa!!!!", "a"],
])
def test_most_wanted(func, text, res):
    assert func(text) == res