Workflow: C pointer to Python array?

Question

I am writing some code in C, which reads data in and stores it in a pointer of type;

uint8_t

This data I now want to make accessible in Python3.

For now I have figured out how to make my C code callable with the help of ctypes and I know it works since I am able to print my data out in the Python terminal, but not able to store it in a variable.

My problem lies in that I do not know how to transform this pointer into an array which can be stored and manipulated in Python, so therefore I ask, if someone has a simple example where they move for an example a 3 by 1 array from C into Python, and then are able to work with it there, it would benefit me a lot.

This is either a duplicate of stackoverflow.com/questions/10628337/… or stackoverflow.com/questions/14584439/… depending on what you're using to wrap your C code (your question and tags tell me different things). — DavidW
– DavidW, Commented Nov 4, 2019 at 7:51
Thanks, still new to C, so I really struggle at looking at others code right now, but managed to find a solution my self. Thanks, for commenting — CuriousAboutStuff
– CuriousAboutStuff, Commented Nov 4, 2019 at 18:05

CuriousAboutStuff · Accepted Answer · 2019-11-04 18:04:43Z

0

Okay, so I managed to figure it out, maybe not the smartest way, but atleast it works now. Since I return a pointer of the type, ``` u_int8 * ```` in C, I amble then in Python to use something like this:

g = (ctypes.c_float*5271).from_address(a)

And then g[0], g[:], etc. to get the data etc.

answered Nov 4, 2019 at 18:04

CuriousAboutStuff

1

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Workflow: C pointer to Python array?

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related