[Python-Dev] Hook Extension Module Import?
Sun, 20 Apr 2003 14:31:05 -0400
On Sun, Apr 20, 2003, David Abrahams wrote:
> Aahz <firstname.lastname@example.org> writes:
>> On Sun, Apr 20, 2003, David Abrahams wrote:
>>> Aahz <email@example.com> writes:
>>>> On Sun, Apr 20, 2003, David Abrahams wrote:
>>>>> I think I need a way to temporarily (from 'C'), arrange to be notified
>>>>> just before and just after a new extension module is loaded. Is this
>>>>> possible? I didn't see anything obvious in the source. BTW, I'd be
>>>>> just as happy if it were possible to do the same thing for any module
>>>>> (i.e., not discriminating between extension and pure python modules).
>>> I guess I should take that to mean "you can't do that yet" (?)
>> As the PEP says, you *could* define an __import__ hook, but that would
>> likely be more effort than you want.
> It also says:
> The situation gets worse when you need to extend the import
> mechanism from C: it's currently impossible, apart from hacking
> Python's import.c or reimplementing much of import.c from scratch.
> OTOH, it's not obvious to me why this should be so. Can't I
> access/replace builtins.__import__ from C/C++?
Sure, but then you need to replace import.c, just as it says. I'd be
inclined to do the heavy lifting in Python with a callback into C code
(after all, you're not calling it so frequently as to make it a
Aahz (firstname.lastname@example.org) <*> http://www.pythoncraft.com/
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