issues: 309686915

This data as json

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
309686915 MDU6SXNzdWUzMDk2ODY5MTU= 2027 square-bracket slice a Dataset with a DataArray 6213168 open 0     4 2018-03-29T09:39:57Z 2022-04-18T03:51:25Z   MEMBER      

Given this: ``` ds = xarray.Dataset( data_vars={ 'vote': ('pupil', [5, 7, 8]), 'age': ('pupil', [15, 14, 16]) }, coords={ 'pupil': ['Alice', 'Bob', 'Charlie'] })

<xarray.Dataset> Dimensions: (pupil: 3) Coordinates: * pupil (pupil) <U7 'Alice' 'Bob' 'Charlie' Data variables: vote (pupil) int64 5 7 8 age (pupil) int64 15 14 16 ```

Why does this work: ``` ds.age[ds.vote >= 6]

<xarray.DataArray 'age' (pupil: 2)> array([14, 16]) Coordinates: * pupil (pupil) <U7 'Bob' 'Charlie' ```

But this doesn't? ``` ds[ds.vote >= 6]

KeyError: False `ds.vote >= 6`` is a DataArray with dims=('pupil', ) and dtype=bool, so I can't think of any ambiguity in what I want to achieve?

Workaround: ``` ds.sel(pupil=ds.vote >= 6)

<xarray.Dataset> Dimensions: (pupil: 2) Coordinates: * pupil (pupil) <U7 'Bob' 'Charlie' Data variables: vote (pupil) int64 7 8 age (pupil) int64 14 16 ```

 
{
    "url": "https://api.github.com/repos/pydata/xarray/issues/2027/reactions",
    "total_count": 0,
    "+1": 0,
    "-1": 0,
    "laugh": 0,
    "hooray": 0,
    "confused": 0,
    "heart": 0,
    "rocket": 0,
    "eyes": 0
}
     13221727 issue

Links from other tables