求一个计算天数的Python程序

Question

https://img-mid.csdnimg.cn/release/static/image/mid/ask/395399959466148.jpg

Answer 1

import re

ymd=input('请输入yyyy-mm-dd格式日期：')
if re.match(r"^\d{4}(-\d{2}){2}$",ymd):
    year,month,day=map(int,ymd.split('-'))
    isRN=year%400==0 or (year%4==0 and year%100!=0)
    mth_days=[31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
    for i in range(month-1):
        day+=mth_days[i]
    if month>2 and isRN:
        day+=1
    print('第%d天'%day)
else:
    print('input error')