python本地时间与UTC时间转换

时间格式转换

UTC时间格式：2014-09-18T10:42:16.126Z
普通时间格式：2014-09-18 10:42:16

>>> import datetime

>>> utc = “2014-09-18T10:42:16.126Z”
>>> local = “2014-09-18 10:42:16”

>>> UTC_FORMAT = “%Y-%m-%dT%H:%M:%S.%fZ”
>>> LOCAL_FORMAT = “%Y-%m-%d %H:%M:%S”

>>> datetime.datetime.strptime(utc, UTC_FORMAT)
datetime.datetime(2014, 9, 18, 10, 42, 16, 126000)

>>> datetime.datetime.strptime(local, LOCAL_FORMAT)
datetime.datetime(2014, 9, 18, 10, 42, 16)

CODE

函数输入输出类型: datetime.datetime

import time
import datetime


def utc2local(utc_st):
    “”“UTC时间转本地时间（+8:00）”“”
    now_stamp = time.time()
    local_time = datetime.datetime.fromtimestamp(now_stamp)
    utc_time = datetime.datetime.utcfromtimestamp(now_stamp)
    offset = local_time - utc_time
    local_st = utc_st + offset
    return local_st

def local2utc(local_st):
    “”“本地时间转UTC时间（-8:00）”“”
    time_struct = time.mktime(local_st.timetuple())
    utc_st = datetime.datetime.utcfromtimestamp(time_struct)
    return utc_st

utc_time = datetime.datetime(2014, 9, 18, 10, 42, 16, 126000)

# utc转本地
local_time = utc2local(utc_time)
print local_time.strftime(“%Y-%m-%d %H:%M:%S”)
# output：2014-09-18 18:42:16


# 本地转utc
utc_tran = local2utc(local_time)
print utc_tran.strftime(“%Y-%m-%d %H:%M:%S”)
# output：2014-09-18 10:42:16