Arch Linux User Repository

I recently encountered issues to build Cython extension for a project using python 3.6, installed using pyenv, while my system use python3.9 by default. The error was easily reproducible in console, and was related to missing _pydevd_frame_eval/pydevd_frame_evaluator.c in pydevd folder.

I noticed that the PKGBUILD run

find pycharm-${pkgver}/plugins/python/helpers/pydev/ \( -name *.c -o -name *.so -o -name *.pyd \) -delete

as first command in the build step. While I understand that *.so and *.pyd files may be deleted before building, I don't understand why *.c files are deleted too. Is it an error ?

By the way I edited the PKGBUILD before building the package to remove *.c files deletion, and I was able to build Cython extension for my py3.6 project

find pycharm-${pkgver}/plugins/python/helpers/pydev/ \( -name *.so -o -name *.pyd \) -delete

I also had the problem "ModuleNotFoundError: No module named 'Cython'" when building from the terminal with Pamac on Manjaro. However, I had a conda virtual environment activated.

The build finished successfully for me when using Pamac GUI.

I don't have errors in the build but I'll check it, thanks @Cthulu201

I usually build in a clean chroot (no makepkg -s) and was getting Cython errors. I've modified your PKGBUILD so it builds and runs for me. Happy for any feedback: https://0bin.net/paste/0tfmKwCN#wGHqvnUJ7bAHshbTKahSR1DeqMyWndoN+CPmEaHz9KX

It looks like my issues was that I use pyenv and I had 3.9 set as the global python version. setting pyenv global system works for me. Note that there is an issue with setting the global version to system on Arch, in that it check for python being in a bin dir, not sbin and on my system /usr/sbin was a symlink to /usr/bin and sbin was first. To fix it I unlinked /usr/sbin, set pyenf global to system, installed pycharm, then added the link back.

I am getting the same error. Fresh terminal with no environment loaded, and nothing in PYTHONPATH. I also made sure to clear the cache and do a clean build.

==> Starting build()...
Traceback (most recent call last):
  File "/home/shawn/.cache/yay/pycharm-professional/src/pycharm-2021.1/plugins/python/helpers/pydev/setup_cython.py", line 112, in <module>
build_extension("_pydevd_bundle", extension_name, target_pydevd_name, force_cython, extension_folder, True)
  File "/home/shawn/.cache/yay/pycharm-professional/src/pycharm-2021.1/plugins/python/helpers/pydev/setup_cython.py", line 69, in build_extension
    from Cython.Build import cythonize  # @UnusedImport
ModuleNotFoundError: No module named 'Cython'
==> ERROR: A failure occurred in build().
    Aborting...
error making: pycharm-professional

Works now, I did indeed have a virtualenv active. Oops and thanks @XavierCLL, @klaasjanelzinga!

Hi @evandare, pls check if you do not have a virtualenv active.

Hi @evandare, your error may be due to various reasons (but none related to this package) check your PYTHONPATH of if you have a special installation of some components in Python. You can also build the package in a clean chroot [0] or use an unofficial repo [1].

[0] https://wiki.archlinux.org/index.php/DeveloperWiki:Building_in_a_clean_chroot [1] chaotic-aur

Hi, I get the following error during the build step:

==> Starting build()...
Traceback (most recent call last):
  File "/home/XXX/.cache/yay/pycharm-professional/src/pycharm-2021.1/plugins/python/helpers/pydev/setup_cython.py", line 112, in <module>
    build_extension("_pydevd_bundle", extension_name, target_pydevd_name, force_cython, extension_folder, True)
  File "/home/XXX/.cache/yay/pycharm-professional/src/pycharm-2021.1/plugins/python/helpers/pydev/setup_cython.py", line 69, in build_extension
    from Cython.Build import cythonize  # @UnusedImport
ModuleNotFoundError: No module named 'Cython'
==> ERROR: A failure occurred in build().
    Aborting...
error making: pycharm-professional

Installing Cython via pacman -S cython doesn't seem to fix it.