Protocol Buffer的使用(p

1.需要安装Protocol Buffer

直接：apt-get install protobuf-compiler

安装完毕后，进入解压目录的python目录，执行Python setup.py install；安装python的protobuf库即可。

2.可以查询到它的大致用法

pijing@ubuntu:~/protobuffer$ protoc -h
Usage: protoc [OPTioN] PROTO_FILES
Parse PROTO_FILES and generate output based on the options given:
  -IPATH, --proto_path=PATH   Specify the directory in which to search for
                              imports.  May be specified multiple times;
                              directories will be searched in order.  If not
                              given, the current working directory is used.
  --version                   Show version info and exit.
  -h, --help                  Show this text and exit.
  --encode=MESSAGE_TYPE       Read a text-fORMat message of the given type
                              from standard input and write it in binary
                              to standard output.  The message type must
                              be defined in PROTO_FILES or their imports.
  --decode=MESSAGE_TYPE       Read a binary message of the given type from
                              standard input and write it in text format
                              to standard output.  The message type must
                              be defined in PROTO_FILES or their imports.
  --decode_raw                Read an arbitrary protocol message from
                              standard input and write the raw tag/value
                              pairs in text format to standard output.  No
                              PROTO_FILES should be given when using this
                              flag.
  -oFILE,                     Writes a FileDescriptorSet (a protocol buffer,
    --descriptor_set_out=FILE defined in descriptor.proto) containing all of
                              the input files to FILE.
  --include_imports           When using --descriptor_set_out, also include
                              all dependencies of the input files in the
                              set, so that the set is self-contained.
  --include_source_info       When using --descriptor_set_out, do not strip
                              SourceCodeInfo from the FileDescriptorProto.
                              This results in vastly larger descriptors that
                              include information about the original
                              location of each decl in the source file as
                              well as surrounding comments.
  --error_format=FORMAT       Set the format in which to print errors.
                              FORMAT may be 'GCc' (the default) or 'msvs'
                              (Microsoft Visual Studio format).
  --plugin=EXECUTABLE         Specifies a plugin executable to use.
                              Normally, protoc searches the PATH for
                              plugins, but you may specify additional
                              executables not in the path using this flag.
                              Additionally, EXECUTABLE may be of the form
                              NAME=PATH, in which case the given plugin name
                              is mapped to the given executable even if
                              the executable's own name differs.
  --cpp_out=OUT_DIR           Generate c++ header and source.
  --java_out=OUT_DIR          Generate Java source file.
  --python_out=OUT_DIR        Generate Python source file.

3.简单使用一下

首先定义proto文件，my.proto
  {
  optional int32 id=1;
  optional string testname=2;
  }

然后，执行命令：

protoc --python_out=./ ./my.proto

得到my_pb2.py文件

最后，在当前目录下新建一个test.py文件夹，写入测试的脚本，包括序列化和反序列化代码：