BTW the code I got working (special thx to @jasonharper):

from bank import value


def test_greeting_charge():
    assert value("hello") == 0
    assert value("hi") == 20
    assert value(" ") == 100
    assert value("test") == 100
    assert value("hi where is 100th st?") == 20
    assert value("oloo") == 100
    assert value("Hi") == 20


if __name__ == "__main__":
    main()