在Python中解析MapQuest反向地理编码api中的数据？

Question

我的代码：

from urllib import request
import json

lat = 31.33 ; long = -84.52

webpage = "http://www.mapquestapi.com/geocoding/v1/reverse?key=MY_KEY&callback=renderReverse&location={},{}".format(lat, long)

response = request.urlopen(webpage)
json_data = response.read().decode(response.info().get_param('charset') or 'utf-8')
data = json.loads(json_data)
print(data)

这给了我以下错误：

^{pr2}$

我试图从MapQuest反向地理编码api读取县和州。反应如下：

renderReverse({"info":{"statuscode":0,"copyright":{"text":"\u00A9 2015 MapQuest, Inc.","imageUrl":"http://api.mqcdn.com/res/mqlogo.gif","imageAltText":"\u00A9 2015 MapQuest, Inc."},"messages":[]},"options":{"maxResults":1,"thumbMaps":true,"ignoreLatLngInput":false},"results":[{"providedLocation":{"latLng":{"lat":32.841516,"lng":-83.660992}},"locations":[{"street":"562 Patterson St","adminArea6":"","adminArea6Type":"Neighborhood","adminArea5":"Macon","adminArea5Type":"City","adminArea4":"Bibb","adminArea4Type":"County","adminArea3":"GA","adminArea3Type":"State","adminArea1":"US","adminArea1Type":"Country","postalCode":"31204-3508","geocodeQualityCode":"P1AAA","geocodeQuality":"POINT","dragPoint":false,"sideOfStreet":"L","linkId":"0","unknownInput":"","type":"s","latLng":{"lat":32.84117,"lng":-83.660973},"displayLatLng":{"lat":32.84117,"lng":-83.660973},"mapUrl":"http://www.mapquestapi.com/staticmap/v4/getmap?key=MY_KEY&type=map&size=225,160&pois=purple-1,32.84117,-83.660973,0,0,|&center=32.84117,-83.660973&zoom=15&rand=-189494136"}]}]})

如何将此字符串转换为dict，以便使用键进行查询？任何帮助都将不胜感激。谢谢！在

Answer 1

首先，去掉URL中的回调参数，因为这是导致响应被包装在renderReverse（）中的原因

webpage = "http://www.mapquestapi.com/geocoding/v1/reverse?key=MY_KEY&location={},{}".format(lat, long)

这将为您提供有效的json，它应该与json.loads你调用的函数。此时，您可以像字典一样与数据交互，通过关键字获取县和州的名称。mapquests构造其json的方式非常奇怪，因此您可能需要进行一些字符串匹配才能获得正确的密钥名。在本例中，“adminArea4Type”设置为“country”，因此您希望访问“adminArea4”键以返回县名称。在

data['results'][0]['locations'][0]['adminArea4']