bogus "relative import" failure with Cython3/Python3

[Guy Streeter]

My .pxy file imports an external python module. This works fine on Cython/Python2, but on 3 I get:

SystemError: Parent module '' not loaded, cannot perform relative import

but this is not a relative import. Anybody else see this happen?

thanks,

--Guy

[Robert Bradshaw]

Do you have a pointer to some code where this is not working?

[Guy Streeter]

While trying to create a simple example of this problem, I narrowed it down to not having an __init__.py in my package directory. In my testing, I would just point PYTHONPATH at the package directory, and that works with 2 but fails with 3.

Some difference there between the two versions that I don't understand.

--Guy

[Chris Barker]

On Wed, Aug 20, 2014 at 12:20 PM, Guy Streeter <guy.st...@gmail.com> wrote:

While trying to create a simple example of this problem, I narrowed it down to not having an __init__.py in my package directory.

well, if it doesn't have an __init__.py, then it isn't a package. And it it isn't a package, you can't relative import in it -- so this makes sense. 

IIRC, py3 tightened up the relative import system.

-CHB

 

In my testing, I would just point PYTHONPATH at the package directory, and that works with 2 but fails with 3.

Some difference there between the two versions that I don't understand.

--Guy

On Tuesday, August 19, 2014 4:07:38 PM UTC-5, Robert Bradshaw wrote:

On Tue, Aug 19, 2014 at 1:31 PM, Guy Streeter <guy.st...@gmail.com> wrote:
> My .pxy file imports an external python module. This works fine on
> Cython/Python2, but on 3 I get:
>
> SystemError: Parent module '' not loaded, cannot perform relative import
>
> but this is not a relative import. Anybody else see this happen?

Do you have a pointer to some code where this is not working?

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