https://qiita.com/moriyama38/items/69d5e07d5f9d81941655#comment-7d9eadb56bc49aff5448

holoscope.py

class Zodiac:

    def __init__(self, name, last_day, best_partner):
        self.name = name
        self.last_day = last_day
        self.best_partner = best_partner

    def __str__(self):
        return self.name


ZODIAC = {
    1: Zodiac('やぎ座', 19, '牡牛座、乙女座、やぎ座'),
    2: Zodiac('水瓶座', 18, '双子座、天秤座、水瓶座'),
    3: Zodiac('うお座', 20, '牡羊座、獅子座、射手座'),
    4: Zodiac('牡羊座', 19, '牡羊座、獅子座、射手座'),
    5: Zodiac('牡牛座', 20, '牡牛座、乙女座、やぎ座'),
    6: Zodiac('双子座', 21, '双子座、天秤座、水瓶座'),
    7: Zodiac('かに座', 22, 'かに座、さそり座、うお座'),
    8: Zodiac('獅子座', 23, '牡羊座、獅子座、射手座'),
    9: Zodiac('乙女座', 22, '牡牛座、乙女座、やぎ座'),
    10: Zodiac('天秤座', 23, '双子座、天秤座、水瓶座'),
    11: Zodiac('さそり座', 22, 'かに座、さそり座、うお座'),
    12: Zodiac('射手座', 21, '牡羊座、獅子座、射手座'),
}


def zodiac(year, month, day):
    if day > ZODIAC[month].last_day:
        month = momth + 1 if month < 12 else 1
    return ZODIAC[month]


def input_birthday():
    print('生年月日を入力します。')
    year = int(input('生まれた年を入力してください。'))
    month = int(input('生まれた月を入力してください。'))
    day = int(input('生まれた日を入力してください。'))
    return year, month, day


def show_best_partner(year, month, day):
    your_zodiac = zodiac(year, month, day)
    print(f'生年月日：{year}/{month}/{day}')
    print(f'星座：{your_zodiac}')
    print(f'あなたと相性がいいのは{your_zodiac.best_partner}です。')


def main():
    year, month, day = input_birthday()
    show_best_partner(year, month, day)

if __name__ == '__main__':
    main()