Using Pure Python Mode with cimports

[kobajin]

Hi,

I am new to Cython, and I want to use Pure Python Mode.In reading the documentation, I'm having trouble understanding how to run this program(https://cython.readthedocs.io/en/latest/src/tutorial/pure.html?highlight=ceil#cimports).

First, I save this program as "my_ceil.py", and compile this it with "cythonize -i my_ceil.py".

The compile succeeds, but when I run it like "python -c 'import my_ceil'", I get the following error: "ModuleNotFoundError: No module named 'cython.cimports'; 'cython' is not a package". The cause is probably in the cimports section, but I don't know how to solve it.

Here are versions of my environment:

Python: 3.9

Cython: 0.29.24

Ubuntu: 20.04

Cheers.

kobajin

[Stefan Behnel]

You need to install Cython 3.0 for this feature to work.

Stefan

[kobajin]

I was able to get the program to work, thank you!

2021年10月10日日曜日 15:02:01 UTC+9 Stefan Behnel:

[Rishu Garg]

Hey Stephan, I'm using Cython 3.0 but I'm still getting the same error

    from cython.cimports.libc import math 

ModuleNotFoundError: 

No module named 'cython.cimports'; 'cython' is not a package

Can you please help me out?

[da-woods]

On 31/08/2022 01:24, Rishu Garg wrote:
>
>     from cython.cimports.libc import math
> ModuleNotFoundError:
> No module named 'cython.cimports'; 'cython' is not a package
>

This sounds like you might not have compiled it with Cython? Are you
just trying to run/import the .py file without compiling it first?

[Rishu Garg]

I figured it out..

Previously, I was doing 

pip install Cython==3.0a1

I instead had to do

pip install Cython==3.0.0a11

and it fixed the problem.

Thanks everyone for your help

[Matan]

Following https://cython.readthedocs.io/en/stable/src/userguide/memoryviews.html#quickstart: 

  from cython.cimports.cython.view import array as cvarray
ModuleNotFoundError: No module named 'cython.cimports.cython'

Cython 3.0.8