cython Questions
2
Solved
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...
Celom asked 21/6 at 17:19
3
Solved
I am currently trying to deploy a project using openmp. I have the flag '-fopenmp' on Travis.
How could I fix that ?
In local I just brew install libopenmp which solved the issue. But not on Trav...
1
Overview
There are a few questions similar to this one but they are all slightly different. To be clear, if values is an array of integers, I want to find perm such that sorted_values (values sort...
10
Solved
I'm trying do from Cython.Build import cythonize and I get the message ImportError: No module named 'Cython', but I installed the Cython with the comand pip install Cython. What's wrong?
Python 3.5...
4
Operating System: macOS Monterey 12.6
Chip: Apple M1
Python version: 3.11.1
I try:
pip3 install gensim
The install process starts well but fatally fails towards the end while running 'clang'. The ...
Metopic asked 2/1, 2023 at 6:55
4
Solved
I'm building a standalone executable using Cython on Linux.
I have the following code:
import psycopg2 as pg
conn = pg.connect('dbname=**** user=**** password=****')
cur = conn.cursor()
cur.exec...
2
I'm wrapping a C++ class with Python, and I cannot compile any C++11 features with the Cython module.
Everything compiles okay when compiling the C++ alone. But when I run this setup.py below:
se...
10
Solved
I am building a django-react site and suddenly my docker-compose no longer builds despite any changes to requirements or image versions.
My requirements.txt looks as follows:
Django>=3.2.4,<4...
Biotechnology asked 17/7, 2023 at 21:57
2
Solved
I am struggling to correctly parallelise a function using Cython. Basically, the problem is to bin some data. The actual code is a bit long, but in the end it does something like this:
def bin_var(...
Edmond asked 20/12, 2017 at 14:21
4
Solved
I have been using Cython to compile my Python files into C files and then use MinGW to create an executable from the C file. Cython works fine, I can type cython test.pyx into the command line and ...
4
Solved
I am trying to create an apk file from bulldozer in Linux, but every time I receive this error that cython is not found. Although I tried installing it, I found the whole internet but didn't get th...
1
Solved
$ python -m pip install tables
stops with
Error: compiling Cython file
Environment
(I am within a virtual environment, created with pyenv. )
Only few packages installed atm
Package Version
-----...
1
My problem:
I am trying to create a python package to upload it to PyPI.
However, when I run
python -m build
inside the project directory (example_package), then I get the following output and err...
Lamothe asked 18/9, 2022 at 22:59
4
I'm trying to build scipy and I get a RuntimeError:
$sudo python setup.py build
Processing scipy/cluster/_vq_rewrite.pyx
Traceback (most recent call last):
File "tools/cythonize.py", line 172, in...
4
Solved
I would like to do
cdef int mom2calc[3]
mom2calc[0] = 1
mom2calc[1] = 2
mom2calc[2] = 3
in a more compact way. Something similar to
cdef int mom2calc[3] = [1, 2, 3]
which is an invalid Cython...
Plod asked 22/9, 2014 at 13:9
4
Solved
Since I found memory-views handy and fast, I try to avoid creating NumPy arrays in cython and work with the views of the given arrays. However, sometimes it cannot be avoided, not to alter an exist...
Sweetsop asked 8/1, 2014 at 20:19
2
I have a simple loop that just sums the second row of a numpy array. In numba I need only do:
from numba import njit
@njit('float64(float64[:, ::1])', fastmath=True)
def fast_sum_nb(array_2d):
s ...
3
Solved
I convert my python code to c by cython and after that compile .c file and use .so in my project.
My problem:
I use __file__ in my python code and in while compile by gcc, it doesn't get error. bu...
6
Solved
In order to install cython ( for python 2.7 , windows 8.1 ), made the download in .zip format, extracted the whole file and run the setup.py . Thus, python shell shows this :
Unable to find pgen, n...
7
Solved
I have a function that reads a file byte by byte and converts it to a floating point array. It also returns the number of elements in said array.
Now I want to reshape the array into a 2D array wit...
1
How can I create .pyi files from cython source code (.pyx)?
Polygraph asked 29/9, 2019 at 12:48
2
Solved
I have an existing python project that is using mostly setup.py to build the project. The project has 2 x Cython extension modules configured in setup.py.
Initially I did pip install -e . for devel...
Dupin asked 21/9, 2022 at 12:27
2
Solved
Why is np.dot so much faster than np.sum? Following this answer we know that np.sum is slow and has faster alternatives.
For example:
In [20]: A = np.random.rand(1000)
In [21]: B = np.random.rand(...
6
Solved
I have a bunch of functions that I've written in C and I'd like some code I've written in Python to be able to access those functions.
I've read several questions on here that deal with a similar...
4
Solved
I am converting a Cython memoryview to a numpy array (to be able to use it in pure Python code):
from libc.stdlib cimport realloc
cimport numpy as np
DTYPE = np.float64
ctypedef np.float64_t DTYP...
Hamrah asked 11/9, 2014 at 13:43
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