python 计算两个日期间的小时数

#!/usr/bin/env python
#encoding: utf-8

import datetime

def dateDiffInHours(t1, t2):
    td = t2 - t1
    return td.days * 24 + td.seconds/3600 + 1

if __name__ == '__main__':

    t1 = datetime.datetime(2016, 3, 31, 0)
    t2 = datetime.datetime(2016, 6, 8, 2)

    print dateDiffInHours(t1, t2)