python解析json字符串

#-*- coding:utf-8 -*-
import json
data = r'{"data":{"a":[{"s":"2017033110102500100369297088B","d":"调查中","e":"2017033110102500000369297188B","f":"fffff","j":"jjjj","applyDate":"2017.03.31"}],"hasNext":false,"nowPage":1},"reqInfo":{"resultMsg":"","traceId":"6666","resultCode":"","showType":"0","success":"true"}}'
json_1 = json.loads(data)

print json_1["data"]["a"][0]["s"]

可以返回值：2017033110102500100369297088B