Question: "load"ing a shared object in python
mail.python.org at bdash.net.nz
Thu Jan 27 19:05:11 EST 2005
On Jan 28, 2005, at 6:48 AM, Rick L. Ratzel wrote:
> Pro Grammer <a at b.c> writes:
>> Hello, all,
>> I am not sure if this is the right place to ask, but could you kindly
>> tell me
>> how to "load" a shared object (like libx.so) into python, so that the
>> methods in
>> the .so can be used? That too, given that the shared object was
>> written in c++,
>> compiled with g++ ?
>> Pro Grammer
> Will the dl standard library module help you? From the Python docs
As Simon Brunning notes, ctypes
(<http://starship.python.net/crew/theller/ctypes/>) is a robust
alternative to the `dl' module.
>>>> import dl, time
>>>> a.call('time'), time.time()
> (929723914, 929723914.498)
A note about this example: the `dl' call returns an integer as that is
what the C time function returns. time.time() in Python is implemented
in terms of C's gettimeofday, ftime or time depending on the platform.
> I'm guessing that there might be some C++ issues, but maybe it's worth
> looking into.
As far as I am aware, neither dl nor ctypes natively support C++. This
is a tricky matter, due to the lack of standards for C++ ABI's covering
name mangling and vtable layout etc. See the thread starting at
249513.html> for more information.
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