Generating python protobuf for paddle.v2.framework #2734
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Python should be able to manipulate Protobuf message because:
1. Python's `create_op_creation_methods` take the `OpProto` array to
generate all `op_creation_methods` in RunTime.
2. All `op_creation_methods` will create an `OpDesc` and pass it to
Paddle C++ method `CreateOp` and return the Op handle.
Here is the list of what is added in this commit:
* Add `protobuf_generate_python` if it is not defined.
* Before cmake 3.4, `protobuf_generate_python` is not defined. Just
copy the implementation of that function in `protobuf.cmake`
* Add `py_proto_compile` function in `cmake/generic.cmake`.
* It follows bazel's API interface.
* https://github.com/pubref/rules_protobuf#rules
* Add an empty package named `paddle.v2.framework`, all python code of
`paddle::framework` will be in that package.
* Generate protobuf's python module `__init__.py` by `touch` while
compiling.
* Change setup.py.in, make `paddle.v2.framework.proto` uses the
generated protobuf pythons.
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Python should be able to manipulate Protobuf message because:
Python's
create_op_creation_methodstake theOpProtoarray togenerate all
op_creation_methodsin RunTime.All
op_creation_methodswill create anOpDescand pass it toPaddle C++ method
CreateOpand return the Op handle.Here is the list of what is added in this commit:
py_proto_compilefunction incmake/generic.cmake.paddle.v2.framework, all python code ofpaddle::frameworkwill be in that package.__init__.pybytouchwhilecompiling.
paddle.v2.framework.protouses thegenerated protobuf pythons.