# -*- coding: utf-8 -*-
from datetime import datetime
import time
# 取当前时间，返回string类型
now_str = time.strftime("%Y-%m-%d %H:%M:%S")
print (type(now_str))
print now_str
print '---'
# 取当前时间,返回datetime类型
print (type(datetime.now()))
print datetime.now()
print '---'
# string -> datetime
time_type = datetime.strptime(now_str, "%Y-%m-%d %H:%M:%S")
print type(time_type)
print time_type
print '---'
# datetime -> string
str_type = datetime.strftime(time_type, "%Y-%m-%d %H:%M:%S")
print type(str_type)
print str_type
#计算
时间间隔 www.jb200.com
starttime = datetime.now()
endtime = datetime.now()
print (endtime - starttime).seconds
# 构造datetime对象
new_dt = datetime(2005, 2, 16)
print type(new_dt)
print new_dt
#
日期计算,这里需要datetime，而不是datetime.datetime
yesterday_date = datetime.datetime.now() - datetime.timedelta(days=1)
yesterday_str = datetime.datetime.strftime(yesterday_date, "%Y%m%d")
# datetime to timestamp
import time
int(time.mktime(dt.timetuple()))
# timestamp to datetime
dt = datetime.fromtimestamp(timestamp)
