python如何将无限分类结构的数据，转换成json格式数据。，pythonjson,id text

import jsonsource=[    {"name":"my document","id":1 , "parentid": 0 },    {"name":"photos","id":2 , "parentid": 1 },    {"name":"Friend","id":3 , "parentid": 2 },    {"name":"Wife","id":4 , "parentid": 2 },    {"name":"Company","id":5 , "parentid": 2 },    {"name":"Program Files","id":6 , "parentid": 1 },    {"name":"intel","id":7 , "parentid": 6 },    {"name":"java","id":8 , "parentid": 6 },]def getChildren(id=0):    sz=[]    for obj in source:        if obj["parentid"] ==id:            sz.append({"id":obj["id"],"text":obj["name"],"children":getChildren(obj["id"])})    return szprint json.dumps(getChildren())

[  {    "text": "my document",    "id": 1,    "children": [      {        "text": "photos",        "id": 2,        "children": [          {            "text": "Friend",            "id": 3,            "children": [ ]          },          {            "text": "Wife",            "id": 4,            "children ": [ ]          },          {            "text": "Company",            "id": 5,            "children": [ ]          }        ]      },      {        "text": "Program Files",        "id": 6,        "children": [          {            "text": "intel",            "id": 7,            "children": [ ]          },          {            "text": "java",            "id ": 8,            "children": [ ]          }        ]      }    ]  }]

代码比较粗糙，性能不好，主要借鉴下思想吧