cython

问题 I'm trying do from Cython.Build import cythonize and I get the message ImportError: No module named 'Cython' , but I instaled the Cython with the comand pip install Cython . What's wrong? Python 3.5 Cython 0.25.2 Windows 8 回答1: just directly install from pypi: pip install Cython https://pypi.org/project/Cython/ 回答2: Use Pip3 command: pip3 install --upgrade cython 回答3: I reinstalled the Cython with conda and install the Microsoft Visual C++ Build Tools and it works fine. 回答4: You can download

问题 I am very new to Cython, yet am already experiencing extraordinary speedups just copying my .py to .pyx (and cimport cython , numpy etc) and importing into ipython3 with pyximport . Many tutorials start in this approach with the next step being to add cdef declarations for every data type, which I can do for the iterators in my for loops etc. But unlike most Pandas Cython tutorials or examples I am not apply functions so to speak, more manipulating data using slices, sums and division (etc).

问题 I am very new to Cython, yet am already experiencing extraordinary speedups just copying my .py to .pyx (and cimport cython , numpy etc) and importing into ipython3 with pyximport . Many tutorials start in this approach with the next step being to add cdef declarations for every data type, which I can do for the iterators in my for loops etc. But unlike most Pandas Cython tutorials or examples I am not apply functions so to speak, more manipulating data using slices, sums and division (etc).

问题 I have some code writen in Python for which the output is a numpy array, and now I want to send that output to C++ code, where the heavy part of the calculations will be performed. I have tried using cython's public cdef , but I am running on some issues. I would appreciate your help! Here goes my code: pymodule.pyx : from pythonmodule import result # result is my numpy array import numpy as np cimport numpy as np cimport cython @cython.boundscheck(False) @cython.wraparound(False) cdef public

问题 Type Hints now are available in Python 3.5 version. In the specification (PEP 484) the goals (and the non-goals) are exposed clearly: Rationale and Goals This PEP aims to provide a standard syntax for type annotations, opening up Python code to easier static analysis and refactoring, potential runtime type checking, and (perhaps, in some contexts) code generation utilizing type information. [...] Of these goals, static analysis is the most important. Non-goals Using type hints for performance

问题 I am trying to wrap the following declaration written in C++ in cython: template<typename T, double (*distance)(const DataPoint&, const DataPoint&)> class VpTree {...} I've also got the following definition in C++: inline double euclidean_distance(const DataPoint &t1, const DataPoint &t2) {...} and I'm trying to wrap this in cython. This is what I've been able to come up with following the documentation: cdef extern from "vptree.h": # declaration of DataPoint omitted here cdef inline double

问题 I just compiled my Python wrapper for C++ classes successfully. However, I am getting following messages when I am trying to load my module to the Python (through import cell ): ImportError: dynamic module does not define module export function (PyInit_cell) I checked that the system is using the Python3 on all cases so this is not a Python version problem. Below is my setup.py file: from distutils.core import setup, Extension from Cython.Build import cythonize setup(ext_modules = cythonize

问题 I try to implement the answer https://stackoverflow.com/a/57480599/7482208, but I am stuck on cimporting one package from another. The code is here: https://github.com/iamishalkin/setuptools_cython_question What I want is to have one independent package wrap from wrapper folder such that you can use it without cust package. And I also want to be able to create custom functions by inheriting FuncWrapper class from wrap . What I do: Firstly I run python setup.py bdist_wheel in wrapper folder

问题 I used pyinstaller to convert my Python file to exe. While executing it I got the below error, AttributeError: type object 'neuralcoref.neuralcoref.array' has no attribute ' reduce_cython ' I'm using Python 3.6.7, Pyinstaller 4.0, NeuralCoref 4, Spacy 2.1.0, Cython 0.27.3. Any suggestion to solve this or better way to convert .py to exe? I've tried py2exe, Cxfreee but doesnt work. A minimal version of my code: import neuralcoref def ApplyCorefResolutionToPreProcessedMail(text, nlp): # load

问题 I have a numpy boolean array: myarr = np.array([[False, True], [True, False]]) If I try to initialise a Cython MemoryView with it, like this: cdef bint[:,:] mymem = myarr I get this error: ValueError: Does not understand character buffer dtype format string ('?') If I do this instead, it works fine: cdef np.int_t[:,:] mymem = np.int_(myarr) How can I store a boolean numpy array using Cython MemoryViews? 回答1: I ran into the same problem some time ago. Unfortunately I did not find a direct