来做练习喽

定义函数day_count(year,month,day),实现功能是传入年月日后返回输入的年月日是当年的第几天。

 def days (year ,month,day):
    if year %4 == 0 and year %100 ==0 or year %400 ==0 :
         day_2yue = 29
     else:
         day_2yue = 28
     days_month = (31,day_2yue,31,30,31,30,31,31,30,31,30,31)
     total_days = 0
     total_days += sum(days_month [:month - 1])
     total_days += day
     print('这是一年的第',total_days ,'天')

 if __name__=="__main__":
     year  = int (input('请输入年份'))
     month = int (input('请输入月份'))
     day   = int (input('请输入日'))
     days (year,month ,day)