How to install protobuf 2.6 for python 3?

[EARob Agar]

How can I install protobuf 2.6 for use by python 3?  Both pip3 install protobuf and manual installation with python3 setup.py build fail with an InvalidSyntax exception in ez_setup.py.

FWIW, here's the full stack trace 

rob@rob-pc:~/lib/protobuf/python$ python3 setup.py build

Traceback (most recent call last):

  File "setup.py", line 199, in <module>

    "Protocol Buffers are Google's data interchange format.",

  File "/usr/lib/python3.4/distutils/core.py", line 108, in setup

    _setup_distribution = dist = klass(attrs)

  File "/usr/local/lib/python3.4/dist-packages/setuptools/dist.py", line 262, in __init__

    self.fetch_build_eggs(attrs['setup_requires'])

  File "/usr/local/lib/python3.4/dist-packages/setuptools/dist.py", line 287, in fetch_build_eggs

    replace_conflicting=True,

  File "/usr/local/lib/python3.4/dist-packages/pkg_resources.py", line 631, in resolve

    dist = best[req.key] = env.best_match(req, ws, installer)

  File "/usr/local/lib/python3.4/dist-packages/pkg_resources.py", line 874, in best_match

    return self.obtain(req, installer)

  File "/usr/local/lib/python3.4/dist-packages/pkg_resources.py", line 886, in obtain

    return installer(requirement)

  File "/usr/local/lib/python3.4/dist-packages/setuptools/dist.py", line 338, in fetch_build_egg

    return cmd.easy_install(req)

  File "/usr/local/lib/python3.4/dist-packages/setuptools/command/easy_install.py", line 613, in easy_install

    return self.install_item(spec, dist.location, tmpdir, deps)

  File "/usr/local/lib/python3.4/dist-packages/setuptools/command/easy_install.py", line 643, in install_item

    dists = self.install_eggs(spec, download, tmpdir)

  File "/usr/local/lib/python3.4/dist-packages/setuptools/command/easy_install.py", line 833, in install_eggs

    return self.build_and_install(setup_script, setup_base)

  File "/usr/local/lib/python3.4/dist-packages/setuptools/command/easy_install.py", line 1055, in build_and_install

    self.run_setup(setup_script, setup_base, args)

  File "/usr/local/lib/python3.4/dist-packages/setuptools/command/easy_install.py", line 1040, in run_setup

    run_setup(setup_script, args)

  File "/usr/local/lib/python3.4/dist-packages/setuptools/sandbox.py", line 68, in run_setup

    DirectorySandbox(setup_dir).run(runner)

  File "/usr/local/lib/python3.4/dist-packages/setuptools/sandbox.py", line 114, in run

    return func()

  File "/usr/local/lib/python3.4/dist-packages/setuptools/sandbox.py", line 67, in runner

    _execfile(setup_script, ns)

  File "/usr/local/lib/python3.4/dist-packages/setuptools/sandbox.py", line 43, in _execfile

    exec(code, globals, locals)

  File "/tmp/easy_install-thdmg8q1/google-apputils-0.4.0/setup.py", line 18, in <module>

    sys.stderr.write(

  File "/tmp/easy_install-thdmg8q1/google-apputils-0.4.0/ez_setup.py", line 79

    except pkg_resources.VersionConflict, e:

                                        ^

SyntaxError: invalid syntax

[Feng Xiao]

+Aaron has reported the same issue. Seems there are some issues around google-apputils. Can you help file an issue here: https://github.com/google/protobuf/issues?

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[Robert Edmonds]

I also ran into this exact same SyntaxError issue with google-apputils
while trying to build with Python 3.

I also found the following issue with google-apputils-python:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=760129

It looks like google-apputils-python declares a versioned dependency on
python-dateutil <2 for some reason, while in Debian we have (for Python
3, only) python-dateutil 2.0. (And for Debian we have the requirement
that packages must build without downloading random content from the
Internet, e.g. through ez_setup and the like.)

'Feng Xiao' via Protocol Buffers wrote:
> +Aaron has reported the same issue. Seems there are some issues around
> google-apputils. Can you help file an issue here:
> https://github.com/google/protobuf/issues?
>
>
> On Mon, Sep 1, 2014 at 3:03 AM, EARob Agar <ea.ro...@gmail.com> wrote:
>

> > How can I install protobuf 2.6 for use by python 3? Both *pip3 install
> > protobuf* and manual installation with *python3 setup.py build* fail with

Robert Edmonds

[Jie Luo]

Our setup.py does not yet do the right thing for 2to3 conversions with
Python 3, manually run the tests and it should work in Python 3.3+

[EARob Agar]

No problem: https://github.com/google/protobuf/issues/9