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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Incompatible with CPP protobuf implementation for Python","articleBody":"Hello,\r\n\r\nI'm trying to use [C++ protobuf implementation for Python](https://github.com/google/protobuf/tree/master/python) since pure Python proto is too slow.\r\nBut importing `gcloud.bigtable` package throws an exception `TypeError: Descriptors should not be created directly, but only retrieved from their parent.`.\r\n\r\nIs there any way to fix this problem?\r\n\r\nThanks,\r\n\r\n1. OS type and version\r\nTested on ubuntu 14.04 / osx 10.12.\r\n\r\n2. Python version and virtual environment information `python --version`\r\nPython 2.7.6\r\n\r\n3. google-cloud-python version `pip show google-cloud`, `pip show google-\u003cservice\u003e` or `pip freeze`\r\ngoogle-cloud 0.22.0 / 0.18.3\r\n\r\n4. Stacktrace if available\r\n```\r\nTraceback (most recent call last):\r\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\r\n  File \"/home/jungho.ahn/pyproto/protobuf/xx/local/lib/python2.7/site-packages/google/cloud/bigtable/__init__.py\", line 18, in \u003cmodule\u003e\r\n    from google.cloud.bigtable.client import Client\r\n  File \"/home/jungho.ahn/pyproto/protobuf/xx/local/lib/python2.7/site-packages/google/cloud/bigtable/client.py\", line 33, in \u003cmodule\u003e\r\n    from google.longrunning import operations_grpc\r\n  File \"/home/jungho.ahn/pyproto/protobuf/xx/local/lib/python2.7/site-packages/google/longrunning/operations_grpc.py\", line 47, in \u003cmodule\u003e\r\n    options=None),\r\n  File \"/home/jungho.ahn/pyproto/protobuf/python/google/protobuf/descriptor.py\", line 494, in __new__\r\n    _message.Message._CheckCalledFromGeneratedFile()\r\nTypeError: Descriptors should not be created directly, but only retrieved from their parent.\r\n```\r\n\r\n5. Steps to reproduce\r\n\r\n```\r\n// Install CPP proto implementation.\r\n$ git clone https://github.com/google/protobuf.git\r\n$ cd protobuf\r\n$ ./autogen.sh\r\n$ CXXFLAGS=\"-fPIC -g -O2\" ./configure\r\n$ make -j12\r\n$ export PROTOC=$PWD/src/protoc\r\n$ cd python\r\n$ python setup.py bdist_wheel --cpp_implementation --compile_static_extension\r\n$ pip uninstall protobuf\r\n$ pip install dist/\u003cwheel file name\u003e (e.g., protobuf-3.2.0-cp27-cp27mu-linux_x86_64.whl)\r\n\r\n// Enable CPP proto implementation.\r\n$ export PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=cpp\r\n$ python -c 'from gcloud import bigtable'\r\n```\r\n\r\n6. Code example\r\n`from gcloud import bigtable`","author":{"url":"https://github.com/junghoahnsc","@type":"Person","name":"junghoahnsc"},"datePublished":"2017-01-28T18:27:05.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":9},"url":"https://github.com/2971/google-cloud-python/issues/2971"}