使用python解析Json字符串-获取Json字符串关键字

import json

data = {
    "statusCode": 0,
    "data": {
        "totoal": "5",
        "height": "5.97",
        "weight": "10.30",
        "age": "3"
    },
    "msg": "成功"
}

#dumps:把字典转换为json字符串
s = json.dumps(data)
print s

#loads:把json转换为dict
s1 = json.loads(s)
print s1

print s1["statusCode"]

print s1["data"]["age"]