another cffi-related installation issue

[rrodrigueznt]

Hi! After trying several alternatives to run R/radian on Android, I ended up in the following scenario where I'm failing again to install radian due to a cffi-related issue. Any help will be welcome!

The scenario:

• Termux (up to date, version 0.118.0, F-Droid installed) running on Android 13 (up to date, security patch level: 1 June 2023) on a Samsung Galaxy A52s 5G cellular
• Ubuntu 22.04 LTS installed with proot-distro. Fully updated. Installed as per https://github.com/termux/proot-distro
• python3 installed (apt install python3); Python 3.10.6
• pip installed (apt install python3-pip); pip3 fails as per pip version >= 21.3 raise "OSError: Cannot find path to android app folder" in Termux's Arch Linux Subsystem pypa/pip#10887
• I created and activated a Python virtual environment and installed an updated pip3 release (pip 23.1.2).
• I tried to install radian in the virtual environment and get (I think the following lines are the most relevant of the entire output):

import _cffi_backend as backend
ImportError: dlopen failed: library
"/tmp/pip-build-env-y3b731_v/normal/lib/python3.11/site-packages/_cffi_backend.cpython-311.so" 
needed or dlopened by
"/data/data/com.termux/files/usr/lib/libpython3.11.so.1.0" is not accessible for the namespace "(default)"

I can locate the required file as cffi is installed in the virtual environment:

(VirtualEnviron) root@localhost:~# locate _cffi_backend.cpython-311.so
/root/VirtualEnviron/lib/python3.11/site-packages/_cffi_backend.cpython-311.so
(VirtualEnviron) root@localhost:~#

(VirtualEnviron) root@localhost:~# pip3 list Package Version
---------- -------
cffi 1.15.1
pip 23.1.2
pycparser 2.21
setuptools 68.0.0
(VirtualEnviron) root@localhost:~#

Thus, I need to improve my understanding of how the build process in a virtual environment works. In this case, I think I'm failing to understand what is not accessible for the namespace "(default)" does mean and how to solve the situation. Any insight will be very welcome!

I really appreciate any help you can provide.

[rrodrigueznt]

(VirtualEnviron) root@localhost:~#
export PATH=$PATH:/root/VirtualEnviron/lib/python3.11/site-packages/

Didn't help.

[aidan-gibson]

Try installing with pipx tbh