小白求教，这种 json 怎么用 python 解析成参数数组插入 mysql 当中？

初学python的小白
json文件如下：
[
{
"_id": "55501245ef21cb978435bdb0",
"index": 0,
"guid": "316f9bb8-1e0e-4b02-ad41-bc2e65966a26",
"balance": "$1,115.97",
"age": 34,
"eyeColor": "brown",
"name": "Manning Schroeder",
"gender": "male",
"about": "Commodo cupidatat occaecat aliquip mollit deserunt fugiat ad sint magna ex anim nisi deserunt anim. Nulla laborum excepteur velit ad sit adipisicing esse minim. Pariatur aliquip reprehenderit adipisicing cupidatat anim labore minim ut.\r\n",
"tags": [
"exercitation",
"amet",
"quis",
"consequat"
],
"friends": [
{
"id": 0,
"name": "Mandy Erickson"
},
{
"id": 1,
"name": "Lang Cooper"
},
{
"id": 2,
"name": "Hill Alvarado"
}
],
"greeting": "Hello, Manning Schroeder! You have 1 unread messages.",
"favoriteFruit": "banana"
},

我现在能会读单个元素，但是在拼接字符串的时候，总是出错，球大神解答。
我的代码如下：
import json,pprint
with open('/Users/xxxosx/Downloads/1.json','r') as jf:
jdata = json.load(jf)
content = 'insert into xxx values'
for i in jdata:
a= {i["_id"],",",i["index"],",",i["guid"],",",i["isActive"],",",i["balance"],i["picture"],i["age"],i["eyeColor"],
i["name"]，i[blahblah]}
content =content.join(a)
print content
for j in range(3):
print i["friends"][j]["id"],i["friends"][j]["name"]