生成指定时间内的时间列表

import datetime

def date_range1(start, end):
    days = (datetime.datetime.strptime(end, "%Y%m%d") - datetime.datetime.strptime(start, "%Y%m%d")).days + 1
    return [datetime.datetime.strftime(datetime.datetime.strptime(start, "%Y%m%d") + datetime.timedelta(i), "%Y%m%d") for i in xrange(days)]


def date_range2(beginDate, endDate):
    dates = []
    dt = datetime.datetime.strptime(beginDate, "%Y%m%d")
    date = beginDate[:]
    while date <= endDate:
        dates.append(date)
        dt = dt + datetime.timedelta(1)
        date = dt.strftime("%Y%m%d")

    return dates

dt_list = date_range1('20161218', '20161220')
// ['20161218', '20161219', '20161220']