如何用python读取json里面的值

[python]

import json
a = '{"status":0,"message":"ok","results":[{"name":"park","location":{"lat":39.498402,"lng":116.007069},"address":"xx road","street_id":"32541349605e7ae96ca3cc1e","detail":1,"uid":"32541349605e7ae96ca3cc1e"}]}'
jsonData = json.loads(a)
print jsonData
print jsonData['results'][0]['location']['lat']
print jsonData['results'][0]['location']['lng']
print jsonData['results'][0]['address']

[python]