#BaiduMap路程计算
def getDistance(deslat,deslng,originlat,originlng):

    url='http://api.map.baidu.com/directionlite/v1/driving?origin='+str(originlat)+','+str(originlng)+'&destination='+str(deslat)+','+str(deslng)+'&ak=' #GET请求

    ak = '百度密钥'

    output = 'json'

    url2 = url+ak+'&output='+output

    # print(url2)

    req = urlopen(url2)

    res = req.read().decode()

    temp = json.loads(res)

    if temp['status']==0 and temp['message']=='ok':

        return temp['result']['routes'][0]['distance']

    else:

        return 0