Python 日期函数

import time, datetime

localtime = time.localtime(time.time())
localtime1 = time.asctime(time.localtime(time.time()))
today = datetime.date.today()
yesterday = datetime.date.today() - datetime.timedelta(days=1)
tomorrow = datetime.date.today() + datetime.timedelta(days=1)
expire_time = '2023-06-26 09:00:00'
d = datetime.datetime.strptime(expire_time, '%Y-%m-%d %H:%M:%S')
print '当地时间：\n', localtime, localtime1
print '当前时间：', time.strftime('%Y-%m-%d %H:%M:%S')
print '当前时间：', datetime.datetime.strftime(datetime.datetime.now(), '%Y-%m-%d %H:%M:%S')
print '当前时间：', str(datetime.datetime.now())[:19]
print '过期时间：', d
print '今天的日期：', today
print '昨天的日期：', yesterday
print '明天的日期：', tomorrow
print datetime.timedelta(milliseconds=1)
print datetime.timedelta(seconds=1)
print datetime.timedelta(minutes=1)
print datetime.timedelta(hours=1)
print datetime.timedelta(days=1)
print datetime.timedelta(weeks=1)

last_month_last_day = datetime.date(datetime.date.today().year,datetime.date.today().month,1)-datetime.timedelta(1)
print last_month_last_day

print time.strftime('%Y-%m-%d %H:%M:%S')
print datetime.datetime.strftime(datetime.datetime.now(),'%Y-%m-%d %H:%M:%S')
print str(datetime.datetime.now())[:19]
print datetime.datetime.strptime(expire_time,'%Y-%m-%d %H:%M:%S')