Python常用time处理

#coding=utf-8
# python2.7工具语句

from sys import version_info
import time
import datetime

if version_info<(3,0):
    print('注意当前是：python2')
else:
    print('python3')
#把datetime转成字符串

def unixtime_toString(timeStamp='1381419600'):
    timeStamp =int(str(timeStamp)[:10])
    return time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(timeStamp))

unixtime_toString('1530859253000')

#把字符串转成datetime
def string_toDatetime(string):
    return datetime.strptime(string, "%Y-%m-%d %H:%M:%S")

#把字符串转成时间戳形式
def string_toTimestamp(strTime):
    return int(time.mktime(time.strptime(strTime, "%Y-%m-%d %H:%M:%S")))

#把时间戳转成字符串形式
def timestamp_toString(stamp):
    return time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(stamp))

#把datetime类型转外时间戳形式
def datetime_toTimestamp(dateTim):
    return time.mktime(dateTim.timetuple())


import datetime

#python 获取当前时间及前一天时间 
print ((datetime.datetime.now()-datetime.timedelta(days=1)).strftime("%Y-%m-%d %H:%M:%S"))

#python datetime获取几分钟、小时、天之前的时间
print ((datetime.datetime.now()-datetime.timedelta(minutes=2)).strftime("%Y-%m-%d %H:%M:%S"))

#可以控制days、seconds、minutes、hours、weeks等


datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')#现在