[날짜]. datetime으로 무슨 요일인지 구하기

from datetime import datetime

def datetime_to_weekday(datetime_str : str) -> None:
    """
    ex ) datetime_str : "19-02-03"
    """
    date_time = datetime.strptime(datetime_str, '%y-%m-%d')
    date_type = date_time.date()
    weekday = date_type.weekday()

    int_to_week = {0: "월",
                1: "화",
                2: "수",
                3: "목",
                4: "금",
                5: "토",
                6: "일"}

    print(int_to_week[weekday] + "요일")

datetime_to_weekday("2022-04-21")