datetime.sample.py

#!/usr/bin/python
# coding: utf-8

import datetime

if __name__ == "__main__":

    #今日の日時
    day  = datetime.date.today()
    time = datetime.datetime.today()
    print day
    print time

    #現在日の各要素
    print day.year
    print day.month
    print day.day

    #現在時間の各要素
    print time.year
    print time.month
    print time.day
    print time.hour
    print time.minute
    print time.second
    print time.microsecond

    #ISO 8601 形式、 ‘YYYY-MM-DD’ 形式
    print day.isoformat()
    #日時表現文字列の生成
    # http://docs.python.jp/2/library/datetime.html#strftime-strptime-behavior
    print time.strftime( "%Y/%m/%d %H:%M:%S" )

    #明日の日付
    print day + datetime.timedelta(days=1)

    #3日前
    print day + datetime.timedelta(days=-3)
    print day - datetime.timedelta(days=3)

    #2000年から今日までの日数
    diff = day - datetime.date(2000,1,1)
    print diff.days