AttributeError: module 'zarr' has no attribute 'MemoryStore'

[geojobueno]

I'm trying to learn how to use the fastscape and using the fastscape-demo I got the error: "AttributeError: module 'zarr' has no attribute 'MemoryStore" when running the model (marine and margin models). This bug occurs using Python related to the python version 3.13.7. The same bug is happening on Binder version (https://hub.gesis.mybinder.org/user/fastscape-lem-fastscape-demo-kljn1is6/lab/tree/examples/marine_model.ipynb) When I installed through conda using python 3.10 I got no error.

[benbovy]

Thanks for the report @geojobueno. This is because Xarray-simlab used here doesn't support Zarr 3.x yet. I works with your python 3.10 conda environment likely because Zarr 2.x is installed in that environment, which is unfortunately the best workaround right now.