pip install fails with Python 3.14

[heplesser]

CSA is pip-installable up to Python 3.13, but with 3.14 installation fails (at least under macOS):

(brew_venv_314) ~> python --version
Python 3.14.0
(brew_venv_314) ~> pip --version
pip 25.2 from /Users/plesser/NEST/code/bld/brew_venv_314/lib/python3.14/site-packages/pip (python 3.14)
(brew_venv_314) ~> pip install csa
Collecting csa
  Using cached csa-0.1.12.tar.gz (31 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error
  
  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [23 lines of output]
      Traceback (most recent call last):
        File "/Users/plesser/NEST/code/bld/brew_venv_314/lib/python3.14/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
          main()
          ~~~~^^
        File "/Users/plesser/NEST/code/bld/brew_venv_314/lib/python3.14/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 373, in main
          json_out["return_val"] = hook(**hook_input["kwargs"])
                                   ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
        File "/Users/plesser/NEST/code/bld/brew_venv_314/lib/python3.14/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 143, in get_requires_for_build_wheel
          return hook(config_settings)
        File "/private/var/folders/zz/kr57pbys6f5dtt17dk7jjh4c0000gn/T/pip-build-env-eryvc2zv/overlay/lib/python3.14/site-packages/setuptools/build_meta.py", line 331, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=[])
                 ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/private/var/folders/zz/kr57pbys6f5dtt17dk7jjh4c0000gn/T/pip-build-env-eryvc2zv/overlay/lib/python3.14/site-packages/setuptools/build_meta.py", line 301, in _get_build_requires
          self.run_setup()
          ~~~~~~~~~~~~~~^^
        File "/private/var/folders/zz/kr57pbys6f5dtt17dk7jjh4c0000gn/T/pip-build-env-eryvc2zv/overlay/lib/python3.14/site-packages/setuptools/build_meta.py", line 512, in run_setup
          super().run_setup(setup_script=setup_script)
          ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/private/var/folders/zz/kr57pbys6f5dtt17dk7jjh4c0000gn/T/pip-build-env-eryvc2zv/overlay/lib/python3.14/site-packages/setuptools/build_meta.py", line 317, in run_setup
          exec(code, locals())
          ~~~~^^^^^^^^^^^^^^^^
        File "<string>", line 12, in <module>
      AttributeError: 'Constant' object has no attribute 's'
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

[mdjurfeldt]

Should be fixed by PR #26. Many thanks for reporting!

[heplesser]

@mdjurfeldt Would you be able to create a new patch release on PyPi including the fix for this issue? At present, any attempt to install NEST requirements while using Python 3.14 fails and one needs to manually edit the NEST requirements file to get around this (either removing CSA or forcing python < 3.14, neither of which is ideal).

[mdjurfeldt]

Sorry, I'll do this and update you.

[pragati-0208]

Hi! I am new to contributing and I'd like to work on this issue.
Could you please assign it to me? I will try to reproduce the installation error and work on a fix.