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From Eric Chung <>
Subject Re: Review Request 66649: Added for generating python protobuf bindings.
Date Thu, 06 Dec 2018 04:26:48 GMT

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(Updated Dec. 6, 2018, 4:26 a.m.)

Review request for mesos, Armand Grillet, Jason Lai, Kevin Klues, and Zhitao Li.

Repository: mesos


The current state of support for python in protoc has two serious
1. The `` files necessary to mark a directory as a python
package aren't generated.
2. The import paths in each of the generated .py files do not reflect
the `--python_path` option passed to `protoc`.

This results in incomplete code generated, preventing it from being used
out of the box. To address this issue, we're adding a `` script
to do end-to-end code generation for python protobuf bindings: the
script generates the bindings based on what's in the `include` dir, then
postprocesses the generated code to add proper import paths and the
`` files.

Diffs (updated)

  src/python/.gitignore fee529dccf57fd24036733f4b470b7b9865a918c 
  src/python/lib/ PRE-CREATION 
  src/python/lib/ 86ee2ad40c0c114b0082f2d4f52f75758d41cbd9 
  support/pylint.config af25dd90cb2d467c688ea4b060dc4640040a068b 




1. under `src/python/lib`, run ``
2. initialize and activate virtualenv: `virtualenv env && . env/bin/activate`
3. install reqs: `pip install -r`
4. try to import modules from generated python code: `python -c 'from mesos.pb2.mesos.v1.master
import master_pb2'`


Eric Chung

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