brew install protobuf

brew install autoconf automake libtool

protoc –version

syntax = "proto3"; //正在使用proto3语法，如果你没有指定这个，编译器会使用proto2
package tutorial;

//*.proto文件中数据类型可以分为两大类:
//复合数据类型包括：枚举和message类型
//标准数据类型包含：整型，浮点，字符串等

message AddressBook {
 //repeated: 该字段可以重复任意次数，包括0次。重复数据的顺序将会保存在protocol buffer中，将这个字段想象成一个可以自动设置size的数组就可以了。
 repeated Person people = 1;
}

message Person {
 //每个字段有一种类型
 //该Number是用来标记该字段在序列化后的二进制数据中所在的field，
 //每个字段的Number在message内部都是独一无二的。也不能进行改变，否则数据就不能正确的解包
 string name = 1;
 int32 id = 2;
 string email = 3;
 float money =4;
 bool work_status = 5;
 repeated PhoneNumber phones =6;
 MyMessage maps =7;
}
message PhoneNumber{
   string number =1;
   PhoneType type =2;
}

enum PhoneType{
  MOBILE =0;
  HOME =1;
  WORK =2;

}

message MyMessage{
  map<int32,int32> mapfield =1;
}

protoc ./addressbook.proto --python_out=./ 

# -*- coding: utf-8 -*-
# @Time : 2019-11-15 11:25
# @Author : cxa
# @File : protobufdemo.py
# @Software: PyCharm
import addressbook_pb2

address_book = addressbook_pb2.AddressBook()
person = address_book.people.add()
person.id = 1
person.name = "cxa"
person.email = "1@qq.com"
person.money = 1234.00
person.work_status = True

phone_number = person.phones.add()
phone_number.number = "123456"
phone_number.type = addressbook_pb2.MOBILE
maps = person.maps
maps.mapfield[1] = 1
maps.mapfield[2] = 2

# 序列化
serializeTostring = address_book.SerializeToString() # 生成字节数组
str_result = address_book.ParseFromString(serializeTostring) # 转为字符串
print(str_result)
for person in address_book.people:
  print(person)

for phone_number in person.phones:
  print(phone_number)

for key in person.maps.mapfield:
  print(key, person.maps.mapfield[key])