计算两个日期相隔的秒数

import datetime


def date_delta(start, end):
    # 转换为标准时间
    start = datetime.datetime.strptime(start,"%Y-%m-%d %H:%M:%S")
    end = datetime.datetime.strptime(end,"%Y-%m-%d %H:%M:%S")
    # 获取时间戳
    timeStamp_start = start.timestamp()
    timeStamp_end = end.timestamp()
    return timeStamp_end - timeStamp_start


start = input()  # sys.stdin.readline()
end = input()  # sys.stdin.readline()

print(date_delta(start, end))