python使用protobuf

1.安装protobuf编译器

./configure --prefix=dist; make; make install; 配置bin路径

2.进入解压后的python目录下

参考README.txt，python setup.py install

3.使用

message RowProto {
required uint32 null_map = 1;
repeated string column = 2;
}

message TableProto {
repeated string column = 1;
repeated string row = 2;
}

编译

protoc --python_out=/data/home/ ./DataService.proto

得到DataService_pb2.py

实例

import sys
import DataService_pb2

#create proto
row = DataService_pb2.RowProto()
row.null_map = 1
row.column.append("wang")
row.column.append("female")
row_str=row.SerializeToString()
print row_str
table = DataService_pb2.TableProto()
table.column.append("name")
table.column.append("gender")
table.row.append(row_str)
table_str = table.SerializeToString()

#process proto
table_proto = DataService_pb2.TableProto()
table_proto.ParseFromString(table_str)
print "column:"
print table_proto.column

row_str = table_proto.row[0]
row_proto = DataService_pb2.RowProto()
row_proto.ParseFromString(row_str.encode('utf8'))
print "row1:"
print row_proto.column

读文件

import sys
import DataService_pb2
  f = open("table", 'rb',)
  table_proto = DataService_pb2.TableProto()
  table_proto.ParseFromString(f.read())
  print table_proto.column
  #print table_proto.row
  for row in table_proto.row:
    row_proto = DataService_pb2.RowProto()
    row_proto.ParseFromString(row.encode('utf-8'))
    print row_proto.column
  f.close()