protobuf

Overview

对多个proto文件同时编译；指定include目录或out目录。

文件

命令

s$ lsout  src$ ls src/bar.proto  foo.proto$ ls out/$ protoc -I=./src --python_out=./out ./src/*.proto$ ls out  src$ ls out/bar_pb2.py  foo_pb2.py$ 

foo.proto

syntax = "proto2";message foo {     required string    name = 1;    required int32     id = 2;    optional string    comment = 3;}

bar.proto

syntax = "proto2";import "foo.proto";message bar {     required string    name = 1;    required int32     id = 2;    optional string    comment = 3;    optional foo       foo2 = 4;}

Python Code (src/test.py)

#!/usr/bin/python'''src$ ./test.py serialized string: 0a0342617210011a0f42617220436f6d                   6d656e74202e2e2e22180a03466f6f10                   021a0f466f6f20436f6d6d656e74202e                   2e2eparsed object: name: "Bar"id: 1comment: "Bar Comment ..."foo {  name: "Foo"  id: 2  comment: "Foo Comment ..."}src$ hexdump -C temp.dat00000000  0a 03 42 61 72 10 01 1a  0f 42 61 72 20 43 6f 6d  |..Bar....Bar Com|00000010  6d 65 6e 74 20 2e 2e 2e  22 18 0a 03 46 6f 6f 10  |ment ..."...Foo.|00000020  02 1a 0f 46 6f 6f 20 43  6f 6d 6d 65 6e 74 20 2e  |...Foo Comment .|00000030  2e 2e                                             |..|00000032src$ '''import binasciiimport syssys.path.append("../out")import foo_pb2import bar_pb2bar = bar_pb2.bar()bar.name = "Bar"bar.id = 1bar.comment = "Bar Comment ..."bar.foo.name = "Foo"bar.foo.id = 2bar.foo.comment = "Foo Comment ..."s = bar.SerializeToString()f = open("temp.dat", "wb")f.write(s)f.close()print "serialized string:", print binascii.b2a_hex(bytearray(s))bar2 = bar_pb2.bar()bar2.ParseFromString(s)print "parsed object:", bar2 

说明

这里把pb2.py放在out目录，仅仅是为了演示include, out等目录设置的方法。实际项目中不建议这种做法。