Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
134 lines
4.1 KiB
134 lines
4.1 KiB
Protocol Buffers - Google's data interchange format |
|
=================================================== |
|
|
|
[](https://travis-ci.org/google/protobuf) |
|
|
|
Copyright 2008 Google Inc. |
|
|
|
This directory contains the Python Protocol Buffers runtime library. |
|
|
|
Normally, this directory comes as part of the protobuf package, available |
|
from: |
|
|
|
https://developers.google.com/protocol-buffers/ |
|
|
|
The complete package includes the C++ source code, which includes the |
|
Protocol Compiler (protoc). If you downloaded this package from PyPI |
|
or some other Python-specific source, you may have received only the |
|
Python part of the code. In this case, you will need to obtain the |
|
Protocol Compiler from some other source before you can use this |
|
package. |
|
|
|
Development Warning |
|
=================== |
|
|
|
The Python implementation of Protocol Buffers is not as mature as the C++ |
|
and Java implementations. It may be more buggy, and it is known to be |
|
pretty slow at this time. If you would like to help fix these issues, |
|
join the Protocol Buffers discussion list and let us know! |
|
|
|
Installation |
|
============ |
|
|
|
1) Make sure you have Python 2.6 or newer. If in doubt, run: |
|
|
|
$ python -V |
|
|
|
2) If you do not have setuptools installed, note that it will be |
|
downloaded and installed automatically as soon as you run `setup.py`. |
|
If you would rather install it manually, you may do so by following |
|
the instructions on [this page](https://packaging.python.org/en/latest/installing.html#setup-for-installing-packages). |
|
|
|
3) Build the C++ code, or install a binary distribution of `protoc`. If |
|
you install a binary distribution, make sure that it is the same |
|
version as this package. If in doubt, run: |
|
|
|
$ protoc --version |
|
|
|
4) Build and run the tests: |
|
|
|
$ python setup.py build |
|
$ python setup.py test |
|
|
|
To build, test, and use the C++ implementation, you must first compile |
|
`libprotobuf.so`: |
|
|
|
$ (cd .. && make) |
|
|
|
On OS X: |
|
|
|
If you are running a Homebrew-provided Python, you must make sure another |
|
version of protobuf is not already installed, as Homebrew's Python will |
|
search `/usr/local/lib` for `libprotobuf.so` before it searches |
|
`../src/.libs`. |
|
|
|
You can either unlink Homebrew's protobuf or install the `libprotobuf` you |
|
built earlier: |
|
|
|
$ brew unlink protobuf |
|
|
|
or |
|
|
|
$ (cd .. && make install) |
|
|
|
On other *nix: |
|
|
|
You must make `libprotobuf.so` dynamically available. You can either |
|
install libprotobuf you built earlier, or set `LD_LIBRARY_PATH`: |
|
|
|
$ export LD_LIBRARY_PATH=../src/.libs |
|
|
|
or |
|
|
|
$ (cd .. && make install) |
|
|
|
To build the C++ implementation run: |
|
|
|
$ python setup.py build --cpp_implementation |
|
|
|
Then run the tests like so: |
|
|
|
$ python setup.py test --cpp_implementation |
|
|
|
If some tests fail, this library may not work correctly on your |
|
system. Continue at your own risk. |
|
|
|
Please note that there is a known problem with some versions of |
|
Python on Cygwin which causes the tests to fail after printing the |
|
error: `sem_init: Resource temporarily unavailable`. This appears |
|
to be a [bug either in Cygwin or in |
|
Python](http://www.cygwin.com/ml/cygwin/2005-07/msg01378.html). |
|
|
|
We do not know if or when it might be fixed. We also do not know |
|
how likely it is that this bug will affect users in practice. |
|
|
|
5) Install: |
|
|
|
$ python setup.py install |
|
|
|
or: |
|
|
|
$ (cd .. && make install) |
|
$ python setup.py install --cpp_implementation |
|
|
|
This step may require superuser privileges. |
|
NOTE: To use C++ implementation, you need to export an environment |
|
variable before running your program. See the "C++ Implementation" |
|
section below for more details. |
|
|
|
Usage |
|
===== |
|
|
|
The complete documentation for Protocol Buffers is available via the |
|
web at: |
|
|
|
https://developers.google.com/protocol-buffers/ |
|
|
|
C++ Implementation |
|
================== |
|
|
|
The C++ implementation for Python messages is built as a Python extension to |
|
improve the overall protobuf Python performance. |
|
|
|
To use the C++ implementation, you need to install the C++ protobuf runtime |
|
library, please see instructions in the parent directory.
|
|
|