On 28 Nov 2015 12:06, "James Oren" <contactjameso...@gmail.com> wrote: > > Hi all, this is my first time using the mailing list. > > I'm trying to learn how to use C to extend my code, and have already worked > out how to use ctypes. I'm now trying to learn the full C extension module > approach with Python.h and have worked through the Python doc and a couple > other examples. They all use examples where the C function expects a > primitive, so now I'd like to learn how to use a Python list object. I > guess that a C-based numpy array may be easier to write for, but just for > now I'd like to stick to lists. > > So far I've worked out to use the parse tuple command with the "O" argument > and I think thanks to an archived post on this mailing list I've worked out > how to get the Python list data into a C array and pass it to the function > to modify, now I just need to return a list object of the updated C array > data. > > I'd like it to be that calling this function from Python has the same > effect as modifying the list in-place, so I guess I need to either empty > the original and repopulate it with the c array data, or build a new list > object with the data and reassign it to the original list name .... Which > seems like it'd be troublesome? Unfortunately I've hit a brick wall and > can't find any examples :-(
Can you post an example of a function written in Python that does what you want? Does PyObject_SetItem do what you want: https://docs.python.org/3.5/c-api/object.html -- Oscar _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
