pyang cannot run in Python 3.12 (pkg_resources)

[JennToo]

Traceback (most recent call last):
  File "/tmp/build/.porg/venvs/3.12-d/bin/pyang", line 5, in <module>
    from pyang.scripts.pyang_tool import run
  File "/tmp/build/.porg/venvs/3.12-d/lib/python3.12/site-packages/pyang/scripts/pyang_tool.py", line 12, in <module>
    from pyang import plugin
  File "/tmp/build/.porg/venvs/3.12-d/lib/python3.12/site-packages/pyang/plugin.py", line 5, in <module>
    import pkg_resources
ModuleNotFoundError: No module named 'pkg_resources'

pkg_resources has been deprecated for a while now and was finally removed in 3.12 it seems.

[991jo]

I ran into the same problem when my default venv was created with setuptools version 69.
When I upgraded it via pip install --upgrade setuptools to 72.2.0 it worked again.

[cpascual]

pkg_resources can be replaced by importlib.resources which is available since python 3.7 (the oldest version supported by pyang)

Note: I ran into this using python 3.11 but installing pyang with uv which does not install setuptools by default:

$ uvx  pyang --version
Traceback (most recent call last):
...
ModuleNotFoundError: No module named 'pkg_resources'

A workaround that works for me is:

$ uvx --with setuptools pyang --version
pyang 2.6.1

IMHO this is a bug in pyang because it uses pkg_resources without declaring setuptools as a dependency.