You should consider Boost.Python if you are not planning to generate bindings for other languages as well with swig. If you have a lot of functions and classes to bind, Py++ is a great tool that automatically generates the needed code to make the bindings. Pybindgen may also be an option, but it’s a new … Read more
Look here for an answer. The basic idea is that you want cpython.array.array and cpython.array.clone (not cython.array.*): from cpython.array cimport array, clone # This type is what you want and can be cast to things of # the “double[:]” syntax, so no problems there cdef array[double] armv, templatemv templatemv = array(‘d’) # This is fast … Read more
Contrary to what Adam Matan and others assert, you can in fact create a single executable binary file using Cython, from a pure Python (.py) file. Yes, Cython is intended to be used as stated – as a way of simplifying writing C/C++ extension modules for the CPython python runtime. But, as nudzo alludes to … Read more
Update if you have Visual Studio 2022 no need to download VS Build Tools, as you can use for the same purpose Visual Studio Installer (located in VS2022 start menu folder) As pointed out by JfredoJ You need windows 10 SDK, Download visual studio build tools and install Visual C++ Build tools core features. MSVC … Read more
One can pass language_level as an option to the cythonize-function in the setup.py-script: ext_modules = cythonize( extensions, compiler_directives={‘language_level’ : “3”} # or “2” or “3str” ) Another possible syntax is ext_modules = cythonize(extensions, language_level = “3”) The above might be more convenient than to add #cython: language_level=3 to every pyx-file in the project, which might … Read more
It sounds like GCC 4.7.0 has finally removed the deprecated -mno-cygwin option, but distutils has not yet caught up with it. Either install a slightly older version of MinGW, or edit distutils\cygwinccompiler.py in your Python directory to remove all instances of -mno-cygwin.
I’ve done this myself now, in a Python package simplerandom (BitBucket repo – EDIT: now github) (I don’t expect this to be a popular package, but it was a good chance to learn Cython). This method relies on the fact that building a .pyx file with Cython.Distutils.build_ext (at least with Cython version 0.14) always seems … Read more
In your setup.py, the Extension should have the argument include_dirs=[numpy.get_include()]. Also, you are missing np.import_array() in your code. — Example setup.py: from distutils.core import setup, Extension from Cython.Build import cythonize import numpy setup( ext_modules=[ Extension(“my_module”, [“my_module.c”], include_dirs=[numpy.get_include()]), ], ) # Or, if you use cythonize() to make the ext_modules list, # include_dirs can be passed … Read more
Warning: a Cython core developer’s opinion ahead. I almost always recommend Cython over ctypes. The reason is that it has a much smoother upgrade path. If you use ctypes, many things will be simple at first, and it’s certainly cool to write your FFI code in plain Python, without compilation, build dependencies and all that. … Read more