[v3.0.0-beta] Python 3 can't import properly related proto files

[omikronsc]

Hello!

I have two proto files core.proto and items.proto, items.proto import core.proto. They are generated into project's subdirectory src_gen. Problem is that in generated Python code there is import in items_pb2.py:

    import core_pb2 as core__pb2

It doesn't work in Python 3 since it's relative import and syntax for relative import changed in Python 3. It should be (at the begining for python 2.5+ compatibility):

from __future__ import absolute_import 

And replace import:

    from . import core_pb2 as core__pb2

This is how I feel it should solved but I might be unaware of some other method. Is there any other solution?

[xdmiodz]

Looks similar to #881, I think have a workaround/possible solution for the issue there

[omikronsc]

Actually I used another trick to solve this issue. I run 2to3 on src_gen folder after every invoke to protoc and everything works properly both on Python 2.7 and 3

But it is what it is - a workaround.

[haberman]

I think this is a duplicate of #1491