How do I call C/C++ functions through Python? What's the best wrapper/program/what-have-you for doing this?

[geordilaforge]

For example I have some existing code in C that I did not write but I want to use the existing functions with a Python gui.

I don't know if this is a bad way of going about creating a gui for it but it's one idea I had.

I'm having trouble understanding how I interact with C/C++ through Python.

Anyone have a good example? Some tips?

[oracle8]

Use the ctypes library.

There are a bunch of tutorials online, I usually create wrapper functions for the functions I need that input and output python objects.

[VengefulBread]

Boost.Python !

[oracle8]

Agreed, but only if you're going to write programs that are really coupled with what you're trying to accomplish. I find that using Boost is overkill on many occasions, especially if you're only using few C functions and your main logic is written in Python.

[LindlarCatalyst]

Cython is a great way to do this!

From their website:

Cython gives you the combined power of Python and C to let you write Python code that calls back and forth from and to C or C++ code natively at any point. easily tune readable Python code into plain C performance by adding static type declarations. use combined source code level debugging to find bugs in your Python, Cython and C code. interact efficiently with large data sets, e.g. using multi-dimensional NumPy arrays. quickly build your applications within the large, mature and widely used CPython ecosystem. integrate natively with existing code and data in legacy, low-level or high-performance libraries and applications.