Cppyy – Automatic Python-C++ bindings • Hacker News Board

Cppyy – Automatic Python-C++ bindings

#1

Post by d3k » Tue, May 07, 2019, 11:33 AM UTC

Cppyy – Automatic Python-C++ bindings
cppyy.readthedocs.io

Re: Cppyy – Automatic Python-C++ bindings

#2

Post by funkythingsss » Tue, May 07, 2019, 3:20 PM UTC

this looks awesome! Got to try it out on some of my code

Re: Cppyy – Automatic Python-C++ bindings

#3

Post by gshulegaard » Tue, May 07, 2019, 3:59 PM UTC

This is super interesting but if I am looking to bring C++ into my Python code base it would be because performance is important enough to do so. With that in mind I am not sure how this stacks up against compiled half steps like Cython or foreign function interfaces likes ctypes or CFFI instead.

Re: Cppyy – Automatic Python-C++ bindings

#4

Post by malkia » Tue, May 07, 2019, 4:00 PM UTC

There is also the less known https://github.com/google/clif (but not automatic)

Re: Cppyy – Automatic Python-C++ bindings

#5

Post by hatred » Tue, May 07, 2019, 4:05 PM UTC

Does anyone know of any well known tools that generate bindings in other languages e.g., Python from C++ code?

IIUC, this tool does the opposite i.e., generate C++/other language bindings from Python

Re: Cppyy – Automatic Python-C++ bindings

#6

Post by adenner » Tue, May 07, 2019, 4:31 PM UTC

How does this compare to pybind11?

Re: Cppyy – Automatic Python-C++ bindings

#7

Post by carlsonmark » Tue, May 07, 2019, 4:41 PM UTC

adenner wrote: post #6

How does this compare to pybind11?

If you have a C++ project, you want to have Python bindings, and you don't want to share your header files, pybind11 is the way to go.

If you want to / can share your header files, cppyy is a very convenient way of being able to call your C++ code from Python. I'm not sure if there is a way to use it without headers.

Re: Cppyy – Automatic Python-C++ bindings

#8

Post by carlsonmark » Tue, May 07, 2019, 4:43 PM UTC

gshulegaard wrote: post #3

This is super interesting but if I am looking to bring C++ into my Python code base it would be because performance is important enough to do so. With that in mind I am not sure how this stacks up against compiled half steps like Cython or foreign function interfaces likes ctypes or CFFI instead.

If you have a Python code base and are looking to speed up some part of it, Cython is the way to go. Pybind11 and cppyy are more for cases where you have a bunch of C++ code that you want to provide a Python interface for.

Re: Cppyy – Automatic Python-C++ bindings

#9

Post by corysama » Tue, May 07, 2019, 5:20 PM UTC

> PyPy 5.7 and 5.8 have a built-in module cppyy.

Nice.

Re: Cppyy – Automatic Python-C++ bindings

#10

Post by jrussino » Tue, May 07, 2019, 5:27 PM UTC

I need to create Python bindings for a C++ library and after a brief survey of the available options was planning on using SWIG (http://www.swig.org/tutorial.html). How does this compare?