I’m making an interface between Python and Fortran code with Cython. One part of that is retrieving arrays of strings. In Fortran, character(len=3) :: str_array(:) For the sake of this example, suppose str_array contains the following allocate(str_array(2)) str_array = [‘abc’,’def’] My approach is to return this to Cython as a single C char array. I ..
Category : cython
Suppose I have a C function which takes in and writes to a char *. Also, the C function knows the length of the c string ahead of time to be 1024 (+ 1 for a null). For example void c_func(char *c_string) { // writes stuff c_string… } I want to wrap this with cython. ..
I am working on interfacing an existing C/C++ library to Python using Cython, which I have never used before. It’s been going pretty well, except for the following scenario, which I describe using a mock-up example: Suppose I have a class ‘Person’ with one member variable, an int named ‘id’, and another class ‘Group’ with ..
I use Cython to protect Python code. I can protect code well in Linux, it converts .py file to .so. But I get an error in Windows. Do I need to install anything to use on Windows? This is my code. from distutils.core import setup from distutils.extension import Extension from Cython.Distutils import build_ext ext_modules = ..
I am creating an app from Python, and while deploying the py file to apk using Buildozer, it says that Numpy requires Cython 0.29.21 at least. I installed it via pip, but it still gives me this error. I even tried it including it in requirements, but all in vain. Please help me in this. ..
I need to improve this script. The script works in Python 3, but is slow. How and what should be changed in the code to speed up the hashing process? I heard that NumPy from Cython optimizes a fast process, and I also heard that it is possible to speed up the hashing algorithm by ..
So I’m writing a hill climbing algorithm in python, and I am trying to speed it up a little using some cython. Needless to say, it is more difficult than the internet made it out to be, so I took some baby-steps: first thing I wanted to try was simply using the %%cython in a ..
with the goal of executing a block of code, some involving Python scripts, in Android OS, I converted a Python script to C via Cython as follows. setup.py has this: from setuptools import setup from Cython.Build import cythonize from Cython.Compiler import Options Options.embed = "main" setup( ext_modules = cythonize("make_region.pyx") ) Next, do the conversion to ..
Suppose I have the C function which returns void void mysub_wrapper(int *a, int *b) { *b = *a + 1; } Can I make a wrapper with Cython which passes a and b by reference: cdef extern void mysub_wrapper(int *a, int *b) def mysub(int a, int b): mysub_wrapper(&a, &b) Such that it can be called ..
In Cython, you can define getter and setter functions for class properties: cdef class module property a: def __get__(self): cdef int a get_a(&a) return a def __set__(self, int a): set_a(&a) Is there a way to define getters and setters at the module level? For example, the syntax might look something like this. @module_property def a(): ..
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