NRN pip package not installable on Python 3.13

[thorstenhater]

The problem occurs when trying to

uv pip install neuron

and we get

Using Python 3.13.1 environment at: check/env
  × No solution found when resolving dependencies:
  ╰─▶ Because only the following versions of neuron are available:
          neuron==7.8.0.119
          neuron==7.8.0.127
          neuron==7.8.1
          neuron==7.8.1.1
          neuron==7.8.2
          neuron==8.0.0
          neuron==8.0.1
          neuron==8.0.2
          neuron==8.1.0
          neuron==8.2
          neuron==8.2.1
          neuron==8.2.2
          neuron==8.2.3
          neuron==8.2.4
          neuron==8.2.4.8
          neuron==8.2.6
      and neuron<=8.0.0 has no wheels with a matching Python ABI tag (e.g., `cp313`), we can conclude that neuron<=8.0.0
      cannot be used.
      And because neuron==8.0.1 was yanked, we can conclude that neuron<8.0.2 cannot be used.
      And because neuron>=8.0.2,<=8.2.4 has no wheels with a matching Python ABI tag (e.g., `cp313`) and neuron==8.2.4.8
      was yanked (reason: Should have been 8.2.5a), we can conclude that neuron<8.2.6 cannot be used.
      And because neuron==8.2.6 has no wheels with a matching Python ABI tag (e.g., `cp313`) and you require neuron, we can
      conclude that your requirements are unsatisfiable.

      hint: You require CPython 3.13 (`cp313`), but we only found wheels for `neuron` (v8.2.6) with the following Python
      ABI tags: `cp37m`, `cp38`, `cp39`, `cp310`, `cp311`, `cp312`

The usage of uv here is an unimportant detail, the same happens for bare pip, and uv has a nice error message.
For what it's worth, this was seen on MacOS aarch64.

[nrnhines]

Yes. I believe it is time for another update to 8.2.7. I'll look into what cherry picks from the master are needed to make a wheel for Python 3.13

[nrnhines]

Just a few notes to myself about Python 3.13 support in NEURON 8.2.

Python 3.13.1 broke [s for s in sl] where sl is a SectionList. Manual partial cherrypick of 00ba007. #3276

Cherrypick: Launching nrniv -python with Python 3.13.0 does not allow use of gui. (#3239)

Need some judgement about: bldnrnmacpkg.sh is the new name and updated for python3.13 (#3266)
The pkg is more robust due to static linking of readline and ncurses. But bumping MACOSX_DEPLOYMENT_TARGET to 10.15 (from 10.9) perhaps goes too far. My python3.13 on my Apple M1 is 'macosx-10.13-universal2'

Attempt to cherry-pick de07242 Add Python 3.13 support to CI (#3103)
but that results in 9 file conflicts. Looks like it should be done manually from git show de07242b information.

There is a build error when -DNRN_ENABLE_RX3D=ON. Perhaps a cython version issue.

[nrnhines]

NEURON_nightly installers for python3.13 for linux and mac (and a windows setup.exe) are available at
https://dev.azure.com/neuronsimulator/nrn/_build/results?buildId=14202&view=artifacts&pathAsName=false&type=publishedArtifacts . e.g. https://dev.azure.com/neuronsimulator/_apis/resources/Containers/48092753/drop?itemPath=drop%2FNEURON_nightly-8.2.6.23-cp313-cp313-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
But there might be a problem accessing that page. These files were created from #3325 and we are still trying to work around some technical difficulties in regard to full passing of the continuous integration tests.

[pramodk]

It's true that a link to individual wheel file will ask to authenticate but one can download entire artifacts folder using the first link i.e. https://dev.azure.com/neuronsimulator/nrn/_build/results?buildId=14202&view=artifacts&pathAsName=false&type=publishedArtifacts as follows:

Hover on the drop area/row and it will give three vertical dots on the right. Clicking there should give an option to download all wheels

and the downloaded folder should have all wheels: