python之常用的時間格式轉換

記得導入需要的包例如：

import datetime 
import time

1.utc時間轉化爲當地時間(cst時間)

def utc2local(utc_date):
    now_stamp = time.time()
    local_time = datetime.datetime.fromtimestamp(now_stamp)
    utc_time = datetime.datetime.utcfromtimestamp(now_stamp)
    offset = local_time - utc_time
    res_time = utc_date + offset
    return res_time

2.當地時間轉化爲utc時間

def local2utc(local_date):
    now_stamp = time.time()
    local_time = datetime.datetime.fromtimestamp(now_stamp)
    utc_time = datetime.datetime.utcfromtimestamp(now_stamp)
    offset = local_time - utc_time
    res_time = local_date - offset
    return res_time

3.字符串轉換時間

##such as format = "%Y-%m-%dT%H:%M:%SZ"
def string2datetime(str,format="%Y-%m-%dT%H:%M:%SZ"):
    return datetime.datetime.strptime(str,format)

4.datetime轉字符串

## such as format = "%Y-%m-%dT%H:%M:%SZ"
def datetime2str(date_time,format="%Y-%m-%dT%H:%M:%SZ"):
    return date_time.strftime(format)

5.字符串轉化timestamp

##format = "%Y-%m-%dT%H:%M:%S+0000"
def str2timestamp(str,format="%Y-%m-%dT%H:%M:%S+0000"):
    struct_time = time.strptime(utc_str,format)
    timestamp = time.mktime(struct_time)
    return timestamp

6.timestamp轉化爲date

def timestamp2date(now_stamp):
    return datetime.datetime.fromtimestamp(now_stamp)

7.獲取當前時間點 ,並自動格式化

def get_time_now_in_cst(format="%Y-%m-%d %H:%M:%S"):
    tz = pytz.timezone('Asia/Shanghai')
    return datetime.datetime.now(tz).strftime(format)