issues: 510844652

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
510844652 MDU6SXNzdWU1MTA4NDQ2NTI= 3432 Scalar slice of MultiIndex is turned to tuples 1200058 closed 0     5 2019-10-22T18:55:52Z 2022-03-17T17:11:41Z 2022-03-17T17:11:41Z NONE      

Today I updated to v0.14 of xarray and it broke some of my code.

I tried to select one observation of the following dataset: <xarray.Dataset> Dimensions: (genes: 31523, observations: 236) Coordinates: * genes (genes) object 'ENSG00000227232' ... 'ENSG00000232254' * observations (observations) MultiIndex - individual (observations) object 'GTEX-111YS' ... 'GTEX-ZXG5' - subtissue (observations) object 'Whole_Blood' ... 'Whole_Blood' Data variables: [...] ds.isel(observations=1): <xarray.Dataset> Dimensions: (genes: 31523) Coordinates: * genes (genes) object 'ENSG00000227232' ... 'ENSG00000232254' observations object ('GTEX-1122O', 'Whole_Blood') Data variables: [...]

As you can see, observations is now a tuple of ('GTEX-1122O', 'Whole_Blood'). However, the individual and the subtissue should be kept as coordinates.

Output of xr.show_versions()

INSTALLED VERSIONS ------------------ commit: None python: 3.7.4 (default, Aug 13 2019, 20:35:49) [GCC 7.3.0] python-bits: 64 OS: Linux OS-release: 3.10.0-514.16.1.el7.x86_64 machine: x86_64 processor: x86_64 byteorder: little LC_ALL: None LANG: en_US.UTF-8 LOCALE: en_US.UTF-8 libhdf5: 1.10.4 libnetcdf: 4.6.1 xarray: 0.14.0 pandas: 0.25.1 numpy: 1.17.2 scipy: 1.3.1 netCDF4: 1.4.2 pydap: None h5netcdf: 0.7.4 h5py: 2.9.0 Nio: None zarr: 2.3.2 cftime: 1.0.3.4 nc_time_axis: None PseudoNetCDF: None rasterio: None cfgrib: None iris: None bottleneck: None dask: 2.5.2 distributed: 2.5.2 matplotlib: 3.1.1 cartopy: None seaborn: 0.9.0 numbagg: None setuptools: 41.4.0 pip: 19.2.3 conda: None pytest: 5.0.1 IPython: 7.8.0 sphinx: None 
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