获取指定时间差的时间

# -*- coding: utf-8 -*-
# @Time    : 18-10-8 下午5:53
# @Author  : Felix Wang

import time

def get_day_of_day(UTC=False, days=0, hours=0, miutes=0, seconds=0, date=None):
    '''
    if days >= 0, date is larger than today
    if days < 0, date is less than today
    date format = "YYYY-MM-DD"
    '''
    if not date:
        now = time.time()
    else:
        now = time.mktime(time.strptime(date, '%Y-%m-%d %H:%M:%S'))
        UTC = False
    timeNew = now + days * 24 * 60 * 60 + hours * 60 * 60 + miutes * 60 + seconds
    if UTC:
        timeNew = timeNew + time.timezone
    t = time.localtime(timeNew)
    return time.strftime('%Y-%m-%d %H:%M:%S', t)


# 自定义时间，1天120秒后的时间
t = get_day_of_day(date='2018-02-28 23:58:00', days=1,seconds=120)
print(t)
# 使用UTC时间 两小时前
t = get_day_of_day(True, 0, -2)
print(t)
# 当地时间 三天前
t = get_day_of_day(False, -3)
print(t)
# 当地时间 三天后
t = get_day_of_day(False, 3)
print(t)