import hooks

[Patrick Stinson]

Right on, that seemed to work, thanks.
This is different than sys.path_hooks though, which requires a callable or
string subclass?

After some experimentation it looks like you can disallow an import by
raising an import error from your meta_path hook. It seems a little weird
that python will then raise a new ImportError from import.c:find_module(),
but I guess the behavior is desirable..

On Wed, Apr 16, 2008 at 5:17 PM, Gabriel Genellina <gagsl-py2 at yahoo.com.ar>
wrote:

> En Wed, 16 Apr 2008 09:04:36 -0300, Patrick Stinson
> <patrickkidd.lists at gmail.com> escribió:
>
> > I am defining a simple finder/loader object and adding it to
> > sys.meta_path
> > like this:
> >
> > PyRun_SimpleString("import sys; import ousiainternal; sys.meta_path =
> > [ousiainternal.OusiaImporter]");
>
> You should append to the existing meta_path, not replace it, erasing any
> previous content.
> And it must be an *instance* of your importer, not the type itself.
> Note that you're polluting the __main__ module namespace by using
> PyRun_SimpleString; I'd use API calls like PySys_GetObject("meta_path")
> and PyList_Append (PEP 302 guarantees it is a list).
>
> > "sys.meta_path.append(Importer)\n";
>
> Here you append to sys.meta_path, but fail to create the instance first.
>
> > PyRun_SimpleString(importer_source);
>
> You should check the return value; I bet you got a -1 (failure).
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Patrick Kidd Stinson
http://www.patrickkidd.com/
http://pkaudio.sourceforge.net/
http://pksampler.sourceforge.net/
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