The purpose of that line is to declare that the "google" package is just a
namespace, so that other google projects (like AppEngine) can also place
their code under "google".  In retrospect, we probably should have just
created a top-level "protobuf" package.

If you make sure that all packages that you are using under "google" are
part of one big source tree, then the line is unnecessary -- it is only
needed when the "google" package might appear in multiple locations in your
python path.  So if this is the case for you, you can simply replace that
__init__.py with an empty file.

On Thu, Apr 8, 2010 at 12:22 PM, Nick Carter <[email protected]> wrote:

> My project pulls the protobuf source directly from code.google.com, and
> builds the tools and libs (protoc, libprotobuf, libprotobuf-lite) as part of
> its build process.  But now I want to use protos from Python, and I'm having
> trouble getting the python protobuf library to import properly from the
> generated _pb2.py code.
>
> Protobuf's 
> python/<http://code.google.com/p/protobuf/source/browse/trunk/python/> 
> directory
> is in my PYTHONPATH, but my standalone python build chokes on the
> python/google/__init__.py:
>
>
> __import__('pkg_resources').declare_namespace(__name__)
>
>
>
>
> because the hermetic python used by my build doesn't have setuptools.
>  Simply removing that line (or adding a try/except for ImportError) seems to
> make things to work for me.
>
> Do I really need to pull in setuptools, in order to use python protobufs?
>  Or is there a way to make the pkgresources dependency optional?
>
>  - nick
>
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