自用python时间格式转换lib库代码

#!/usr/bin/python
#-*- coding:utf-8 -*-
import time
import datetime
import pytz

tz = pytz.timezone('Asia/Shanghai')

def formatDatetime2Timestamp(dt):
    return int(time.mktime(dt.timetuple()))

def formatDatetime2Datestr(dt):
    return "{0:0>2}-{1:0>2}-{2:0>2} {3:0>2}:{4:0>2}:{5:0>2}".format(dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second)

def formatDatestr2Datetime(datestr):
    return tz.localize(datetime.datetime.strptime(datestr, "%Y-%m-%d %H:%M:%S"))

def formatDatestr2Timestamp(datestr):
    return formatDatetime2Timestamp(formatDatestr2Datetime(datestr))

def formatTimestamp2Datetime(timestamp):
    timestamp = int(timestamp)
    return tz.localize(datetime.datetime.fromtimestamp(timestamp))

def formatTimestamp2Datestr(timestamp):
    timestamp = int(timestamp)
    return datetime.datetime.strftime(formatTimestamp2Datetime(timestamp), "%Y-%m-%d %H:%M:%S")

def getCurDatetime():
    return datetime.datetime.now(tz)

def getOffsetDatetime(dt, second):
    if second <= 0:
        return dt - datetime.timedelta(seconds=second)
    else:
        return dt + datetime.timedelta(seconds=second)

def getCUrYear():
    return getCurDatetime().year

def getCurTimestamp():
    return formatDatetime2Timestamp(getCurDatetime())