Python自动将json转换为protobuf的方法

#vi testjson2pb.json
{
    "name":"scq",
    "age":30,
    "work_unit":"taobao",
    "class_mate":[
{
    "name":"jim",
    "age":30
}
    ]
}

#vi testjson2pb.proto
//class mate
package json2pb;
message PersonInfo {
    //my name
    required string name = 1;
    //my age
    optional int32 age = 2;
    //my work unit
    optional string work_unit = 3;
    message ClassMate {
//name
optional string name = 1;
//age
optional uint32 age = 2;
    }
    repeated ClassMate class_mate = 4;
}

#protoc -I=. --python_out=. testjson2pb.proto
testjson2pb_pb2.py

#vi testjson2pb.py
#!/usr/bin/env python
# coding=utf-8

import sys
import logging
import os
import time
import string
import pbjson
import simplejson
import testjson2pb_pb2

def main():
    f = file("testjson2pb.json")
    s = simplejson.load(f)
    f.close
    t = pbjson.dict2pb(testjson2pb_pb2.PersonInfo, s)
    print t

if __name__  ==  "__main__":
    main()