I wrote:
>> module5.py:
>> from package import module6 # absolute import
>>
>> module6.py:
>> from package import module5
>> [...]
>> ImportError: cannot import name module5
>>
>> Is this behavior expected? Or is it a bug?
Matthias Urlichs replied:
> The problem is that importing with from consists of two steps:
> - load the module
> - add the imported names to the local namespace
>
> Since this addition is by reference to the actual object and not to
> the symbol's name in the other module, a concept which Python doesn't
> have (use Perl if you want this...), your recursive import doesn't
> work.
>
> The solution would be:
> import package.module6 as module6
>
> which should have the same effect.
Perhaps I'm just dense, or perhaps it's because of my choice of names
in my example, but I don't understand the explanation. Could you be
more specific, perhaps with a concrete example? Despite Guido's
"Good explanation!", the above text in the FAQ entry wouldn't
eliminate my confusion. I suspect it's a good explanation for those
that already understand what's going on behind the scenes.
--
David Goodger <goodger@users.sourceforge.net> Open-source projects:
- Python Docutils: http://docutils.sourceforge.net/
(includes reStructuredText: http://docutils.sf.net/rst.html)
- The Go Tools Project: http://gotools.sourceforge.net/
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