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
408645889,MDU6SXNzdWU0MDg2NDU4ODk=,2760,docs clarity for notnull() etc,12852539,closed,0,,,2,2019-02-11T06:09:00Z,2020-11-30T15:10:57Z,2020-11-30T15:10:57Z,NONE,,,,"Some problems with the documentation for `xarray.DataArray.notnull`:

1. The current stable ([v0.11.3](http://xarray.pydata.org/en/v0.11.3/generated/xarray.DataArray.notnull.html)) docs appear broken and provide no prose explanation of the function, input parameters, or return value.
2. The previous ([v0.9.6](http://xarray.pydata.org/en/v0.9.6/generated/xarray.DataArray.notnull.html)) docs describe the function as a _replacement for numpy.isfinite / -numpy.isnan_. Which is it? (`isfinite` and `isnan` are not equivalent in `numpy`; and from the code I suspect it may invoke `pandas.notnull` instead.)
3. The docs unhelpfully give the signature as `DataArray.notnull(*args, **kwargs)`, but I think this function is actually an instance method that takes no positional nor keyword arguments.

It seems like the function is monkey-patched (duck-punched?) onto the class rather than explicitly defined anywhere, so it isn't immediately obvious to me where to best clarify this documentation.","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/2760/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed,13221727,issue