python调用Google Protocol Buffer

最新推荐文章于 2025-03-24 19:51:58 发布

sanguomi

最新推荐文章于 2025-03-24 19:51:58 发布

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本文介绍了如何在Python环境中调用Google Protocol Buffer。通过执行'make', 'make check', 'make install'步骤进行编译检查与安装，接着在Python目录下运行'setup.py install --prefix=$INSTALL_DIR'完成Python环境的集成。" 87381840,8373085,Python初学者：四个基础编程练习,"['Python学习', 'Python零基础', '编程练习']

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下载地址：
http://code.google.com/p/protobuf/downloads/list

安装命令
tar -xzf protobuf-2.5.0.tar.gz
cd protobuf-2.5.0
./configure --prefix=$INSTALL_DIR

make

make check

make install

然后进入python目录,

python setup.py install --prefix=$INSTALL_DIR

写proto文件
package lm;
message Person
{
        required int32 id = 1;
        required string str = 2;
        optional int32 opt = 3;
}
保存为 testp.testpb.proto

编译指令
protoc -I=/home/workspace/testprob --python_out=/home/workspace/testprob /home/workspace/testprob/testp.testpb.proto

google
https://developers.google.com/protocol-buffers/docs/pythontutorial

报错
package directory 'google/protobuf/compiler' does not exist

解决
https://groups.google.com/forum/?fromgroups=#!topic/protobuf/YeT5RW4qCxY
python ./setup.py build
sudo python ./setup.py install

报错
File "/home/workspace/testprob/testp/testpb_pb2.py", line 6, in <module>
    from google.protobuf import reflection as _reflection
File "build/bdist.linux-i686/egg/google/protobuf/reflection.py", line 68, in <module>
File "build/bdist.linux-i686/egg/google/protobuf/internal/python_message.py"
ImportError: cannot import name enum_type_wrapper

解决
http://code.google.com/p/protobuf/issues/detail?id=438
Log message
Fix issue 438 : add missing 'enum_type_wrapper' to setup.py
是安装包的一个改进文件，copy下来，重新安装

根据安装目录下的demo 自己改写了个简单的，觉得它那个还是麻烦

write.py
import testpb_pb4
import sys

p = testpb_pb2.Person()

try:
f = open(sys.argv[1], "rb")
p.ParseFromString(f.read())
f.close()
except IOError:
print sys.argv[1] + ": File not found. Creating a new file."

p.id = 32
p.str = "test"

f = open(sys.argv[1], "wb")
f.write(p.SerializeToString())
f.close()

print "write success"

编译指令 python write.py "test"

read.py
import sys
import testpb_pb2

if len(sys.argv) != 2:
print "Usage:", sys.argv[0], "ADDRESS_BOOK_FILE"
sys.exit(-1)

p = testpb_pb2.Person()

f = open(sys.argv[1], "rb")
p.ParseFromString(f.read())
f.close()

print "p.str = ", p.str
print "p.id=", p.id

编译指令 python read.py "test"