Module name does not match file name
Peter Otten
__peter__ at web.de
Mon Jul 7 06:41:15 EDT 2014
Steven D'Aprano wrote:
> Ah, I think I have a partial answer... but not a complete answer.
>
>
> On Mon, 07 Jul 2014 07:57:21 +0000, Steven D'Aprano wrote:
>
>> Can anyone explain how "import pg" can end up coming from pgmodule.so?
>>
>>
>> Sure enough:
>>
>>>>> import pg
>>>>> pg.__file__
>> '/usr/local/lib/python2.6/dist-packages/pgmodule.so'
>
>
>
> I've looked inside the pgmodule.c source code, and it includes this
> snippet:
>
>
> extern void
> initpg(void)
> {
> char *p;
> int i;
>
> Py_InitModule("pg", pg_methods);
>
>
> which suggests that the pgmodule.so file creates a module called "pg".
> What I don't understand is how "import pg" gets turned into "run
> pgmodule.so"?
It seems the suffix "module.so" is tried automagically by the import
machinery:
$ touch alphamodule.so
$ python
Python 2.7.5+ (default, Feb 27 2014, 19:37:08)
[GCC 4.8.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import alpha
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: ./alphamodule.so: file too short
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