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 557257598,MDU6SXNzdWU1NTcyNTc1OTg=,3731,Repeated coordinates leads to unintuitive (broken?) indexing behaviour,8238804,open,0,,,13,2020-01-30T04:21:57Z,2023-11-30T08:58:22Z,,NONE,,,,"#### MCVE Code Sample ```python import xarray as xr import numpy as np sample_idx = xr.IndexVariable(""sample_id"", [""a"", ""b"", ""c""]) da = xr.DataArray(np.eye(3), coords=(sample_idx, sample_idx)) da.shape # (3, 3) da[1, :].shape # (3, 3) da.loc[""a"", :].shape # (3, 3) da.loc[:, ""a""].shape # () da[:, 0].shape # () da[:, 1] # # array(1.) # Coordinates: # sample_id # array([0., 1., 0.]) # Coordinates: # sample_id # Paste the output here xr.show_versions() here ``` INSTALLED VERSIONS ------------------ commit: None python: 3.7.6 (default, Jan 4 2020, 12:18:30) [Clang 11.0.0 (clang-1100.0.33.16)] python-bits: 64 OS: Darwin OS-release: 19.2.0 machine: x86_64 processor: i386 byteorder: little LC_ALL: None LANG: en_US.UTF-8 LOCALE: en_US.UTF-8 libhdf5: 1.10.2 libnetcdf: 4.6.3 xarray: 0.14.1+5.gb0064b25 pandas: 0.25.3 numpy: 1.18.1 scipy: 1.4.1 netCDF4: 1.5.2 pydap: None h5netcdf: 0.7.4 h5py: 2.9.0 Nio: None zarr: 2.4.0 cftime: 1.0.3.4 nc_time_axis: None PseudoNetCDF: None rasterio: None cfgrib: None iris: None bottleneck: None dask: 2.9.2 distributed: 2.9.3 matplotlib: 3.0.3 cartopy: None seaborn: 0.10.0 numbagg: None setuptools: 44.0.0 pip: 20.0.2 conda: None pytest: 5.3.4 IPython: 7.11.1 sphinx: 2.3.1 ``` Update, adding link to related issue: * https://github.com/pydata/xarray/issues/1378","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3731/reactions"", ""total_count"": 1, ""+1"": 1, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,issue