GCPy does not build with the current environment.yml with python 3.13 or later

[yantosca]

Your name

Bob Yantosca

Your affiliation

Harvard + GCST

What happened? What did you expect to happen?

GCPy 1.6.0 is now available on conda-forge. However, the conda-forge builds use Python versions 3.10, 3.11. and 3.12 but not the most recent Python 3.13 version. Using Python 3.13 causes the environment build to fail due to an error in the esmpy/xesmf packages.

I am just posting this here as a placeholder so that we don't forget to address this in the future.

What are the steps to reproduce the bug?

I opened the PR conda-forge/geoschem-gcpy-feedstock#19 to fix several outdated Python packages. However the build does not work with Python 3.13.

To reproduce the bug, remove the comment characters in these lines:

https://github.com/conda-forge/geoschem-gcpy-feedstock/blob/ba03cce009dfa91afd457ab6b71f8aefe3d3833b/.azure-pipelines/azure-pipelines-linux.yml#L27-L30

https://github.com/conda-forge/geoschem-gcpy-feedstock/blob/ba03cce009dfa91afd457ab6b71f8aefe3d3833b/.azure-pipelines/azure-pipelines-osx.yml#L23-L25

and run the GitHub action.

You can also produce this error by changing python==3.12.0 to python==3.13.0 in the environment.yml file. Then build a new mamba environment with:

$ mamba env create -n gcpy_env_py313 --file=environment.yml`

which will fail due to package inconsistencies.

Please attach any relevant configuration and log files.

What GCPy version were you using?

1.6.0

What environment were you running GCPy on?

Other (please explain below)

What python environment were you using?

conda-forge

Will you be addressing this bug yourself?

Yes

Additional information

No response

[yantosca]

The issue is that ESMF 8.4.0 and later can only be used with xesmf 0.7 or later. See: https://xesmf.readthedocs.io/en/latest/installation.html#notes-about-esmpy

I will try to peg the versions so that the environment will build with Python 3.12, 3.13, and 3.14, which are now supported versions.