Python 3.X 练习集100题 04

输入某年某月某日，判断这一天是这一年的第几天？

方法1：

import time

test_time = input("请输入日期(年-月-日)：")
time_struct = time.strptime(test_time, "%Y-%m-%d")
time_year = time_struct.tm_year
time_yday = time_struct.tm_yday
print("{}是{}年这一年中的第{}天".format(test_time, time_year, time_yday))

方法2：

import datetime

date_time = input("请输入日期(年-月-日)：")
datetime_struct = datetime.datetime.strptime(date_time, "%Y-%m-%d")
time_year = datetime_struct.timetuple().tm_year
time_yday = datetime_struct.timetuple().tm_yday
print("{}是{}年这一年中的第{}天".format(date_time, time_year, time_yday))

方法3：

def get_daynum():
    year = input("请输入年份：")
    month = input("请输入月份：")
    day = input("请输入天：")
    date1 = datetime.date(year=int(year), month=int(month), day=int(day))
    date2 = datetime.date(year=int(year), month=1, day=1)
    return ((date1 - date2).days + 1)

if __name__ == '__main__':
    print(get_daynum())