Merge pull request #1076 from soltanmm/internal-codegen-support

src/compiler/python_generator.cc

src/python/interop/interop/methods.py

src/python/src/grpc/early_adopter/implementations.py

src/python/src/grpc/early_adopter/implementations_test.py

src/python/src/grpc/framework/alpha/__init__.py

src/python/src/grpc/framework/alpha/_face_utilities.py

src/python/src/grpc/framework/alpha/_reexport.py

src/python/src/grpc/framework/alpha/exceptions.py

src/python/src/grpc/framework/alpha/interfaces.py

src/python/src/grpc/framework/alpha/utilities.py

src/python/src/setup.py

test/compiler/python_plugin_test.py