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(Updated April 17, 2018, 8:22 p.m.) Review request for mesos, Armand Grillet, Jason Lai, Kevin Klues, and Zhitao Li. Repository: mesos Description (updated) ------- The current state of support for python in protoc has two serious issues: 1. The `__init__.py` 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 `pb2gen.sh` 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 `__init__.py` files. Diffs (updated) ----- src/python/lib/pb2gen.sh PRE-CREATION src/python/lib/requirements.in 0742f3d846c99c1c4907d9628fb49845564563b2 Diff: https://reviews.apache.org/r/66649/diff/3/ Changes: https://reviews.apache.org/r/66649/diff/2-3/ Testing ------- 1. under `src/python/lib`, run `pb2gen.sh` 2. initialize and activate virtualenv: `virtualenv env && . env/bin/activate` 3. install reqs: `pip install -r requirements.in` 4. try to import modules from generated python code: `python -c 'from mesos.pb2.mesos.v1.master import master_pb2'` Thanks, Eric Chung