Questions tagged [cython]
Cython is a superset of the Python language for quickly generating Python C extensions.
cython
5,343
questions
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Unable to Compile Modified _criterion.pyx in scikit-learn with Cython
I made some small changes to _criterion.pyx in the scikit-learn project and I'm struggling to recompile it.
Here's a summary of the problem and the steps I have taken so far:
Failed Approaches:
1. ...
- 11
1
vote
0
answers
33
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Compiler thinks numpy int_t is an invalid type
I found that when I tried to install the PyPI package bposd or ldpc I received the following error (on a mac):
Error compiling Cython file:
---------------------------------------------------------...
- 45
1
vote
1
answer
39
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A created python thread stucks when code is compiled to cython
I have been trying to figure out why the created thread doesn't work and get stuck when compiled into Cython, as it works normally with CPython...
main.py
from count import count_launcher
if __name__ ...
- 186
3
votes
1
answer
77
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+50
Inaccurate Eigenvectors from LAPACK's ZHEEVR routine
I was trying to replace Scipy's eigh routine in my cython code with C-level LAPACK. Essentially I want to compute eigenvectors corresponding to the largest and smallest eigenvalues of a hermitian ...
- 91
0
votes
1
answer
52
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Cython - How do we implement Tuple of Object in Cython?
I want to implement tuple of object in my cython project.
I couldn't find a way to implement in .pyx file so that I can use it in python.
You can check my get_language method for some reference.
And ...
- 3,352
-2
votes
1
answer
34
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PyCharm cython hinting won't work with libcpp
I can't get PyCharm to hint methods for libcpp library for example for vector container.
This is my code:
from libcpp.vector cimport vector
cdef vector[int] v
v.push_back(1)
PyCharm can't see ...
- 109
-1
votes
0
answers
20
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cython (cglan) hangs on m3 macOS Sonoma x86_64
I have a python program that I've been working with for years and building on a macOS Catalina (x86) machine. The python code is Cythonized for speed and some code security (obfuscation). This has ...
- 99
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48
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Cython - Export my lib to a .so file and use in a C program - Symbols not found
I'm learning cython and the exercise I'm doing wants me to make a lib (.so) to use in a C program (already compiled), that require that lib. I already have done the lib. It is working.
But now, I need ...
0
votes
0
answers
32
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how to read cython shared object file? [closed]
I just came to know about shared object of cython and I tried to read it but unable to read but I am curious in knowing how to read code inside cython shared object file are they readable ?
- 898
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63
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cimport cython module that wraps C libraries
I have this kind of C/cython project:
project/
├── src/
│ └── modules/
│ ├── cython1.pyx
│ ├── cython1.pxd
│ ├── cython2.pyx
│ ├── cython2.pxd
│ ├── includes/
│ │ ...
- 1,050
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25
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Cython function accepting memoryview breaks at runtime
I have a small cython wrapper around some C++ code, which should accept numpy arrays as inputs to the python interface, and loop over them quickly as memoryviews internally. However I get this error ...
- 79
-1
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0
answers
31
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Debugging Cythonized code using Visual Studio 2022
I am trying to debug a Cythonized Python project using Visual Studio 2022 with the following setup.py file:
extensions = [
Extension("ticker", ["ticker.py"],
...
- 1
0
votes
0
answers
47
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Python Embeddable Cython cythonize tools Error On Windows 10
I want to use a Embeddable version of Python, but I encountered an issue while using Cython tools.
I don't want to switch to the installation version.
cythonize utils.py
Traceback (most recent call ...
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1
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0
answers
41
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Cython function to return array of mpz_t objects
I am trying to write a Cython function which returns an array of mpz_t (number type of integers from the gmpy2 library). I can successfully define a fixed-size array:
cpdef void pows(mpz number):
...
- 491
6
votes
2
answers
195
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Parallelizing numpy.sort
I need to sort uint64 arrays of length 1e8-1e9, which is one of the performance bottlenecks in my current project. I have just recently updated numpy v2.0 version, in which the sorting algorithm is ...
