怎么用python判断星座啊好难啊

你好同学！代码供参考

M = [3,4,5,6,7,8,9,10,11,12,1,2,3]
D = [21,20,21,22,23,23,23,24,23,22,20,19,21]
C = ['Aries','Taurus','Gemini','Cancer','Leo','Virgo','Libra','Scorpio','Sagittarius','Capricorn','Aquarius','Pisces']
while 1:
    name = input('Your name:')
    birth_year = int(input('Birth Year:'))
    if(birth_year==-1):
        break
    birth_month = int(input('Birth Month:'))
    birth_day = int(input('Birth Day:'))
    age = 2021-birth_year
    for i in range(len(M)-1):
        if (birth_month==M[i]and birth_day>=D[i]) or (birth_month==M[i+1]and birth_day<D[i+1]):
            constellation = C[i]
            break
    print("你好，%s，你%d岁了，你是%s。"%(name,age,constellation))

输入示例：

Your name:wanji
Birth Year:1993
Birth Month:11
Birth Day:12
你好，wanji，你28岁了，你是Scorpio。
Your name:Joel
Birth Year:-1

有帮助望采纳哟，谢谢啦