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
690769335,MDExOlB1bGxSZXF1ZXN0NDc3NjEzNTQ5,4402,Use a copy of dask_gufuc_kwargs,23618263,closed,0,,,1,2020-09-02T06:52:07Z,2020-09-04T15:57:19Z,2020-09-04T15:57:19Z,CONTRIBUTOR,,0,pydata/xarray/pulls/4402,"<!-- Feel free to remove check-list items aren't relevant to your change -->

 - [x] Closes #4399
 - [ ] Tests added
 - [x] Passes `isort . && black . && mypy . && flake8`
 - [ ] User visible changes (including notable bug fixes) are documented in `whats-new.rst`
 - [ ] New functions/methods are listed in `api.rst`

Following the suggestion of @kmuehlbauer, I am using just a shallow copy since a deep one is not required.","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/4402/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull
537144956,MDExOlB1bGxSZXF1ZXN0MzUyNTUzNDkz,3615,Minor docstring fixes,23618263,closed,0,,,1,2019-12-12T18:33:27Z,2019-12-12T19:13:41Z,2019-12-12T18:48:50Z,CONTRIBUTOR,,0,pydata/xarray/pulls/3615,"Really minor docstring fixes, just added 's' at the end of `kwarg` and deleted ` Default n = 5` from `thin` method's docstring since it doesn't have a default value.","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3615/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull
493765130,MDExOlB1bGxSZXF1ZXN0MzE3NjU2NzEz,3309,Fix DataArray api doc,23618263,closed,0,,,2,2019-09-15T17:36:46Z,2019-09-15T21:22:30Z,2019-09-15T20:27:31Z,CONTRIBUTOR,,0,pydata/xarray/pulls/3309,"<!-- Feel free to remove check-list items aren't relevant to your change -->
Seems like I forgot to point `head`, `tail` and `thin` to the right direction in the `DataArray` api documentation","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3309/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull
491324262,MDExOlB1bGxSZXF1ZXN0MzE1NzE0MjYz,3298,"Accept int value in head, thin and tail",23618263,closed,0,,,7,2019-09-09T21:00:41Z,2019-09-15T07:05:58Z,2019-09-14T21:46:16Z,CONTRIBUTOR,,0,pydata/xarray/pulls/3298,"<!-- Feel free to remove check-list items aren't relevant to your change -->
Related #3278 
This PR makes the methods `head`, `thin` and `tail` for both `DataArray` and `Dataset` accept a single integer value as a parameter. If no parameter is given, then it defaults to 5.
 - [x] Tests added
 - [x] Passes `black . && mypy . && flake8`

","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3298/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull
488812619,MDExOlB1bGxSZXF1ZXN0MzEzNzU3MjIw,3278,"Add head, tail and thin methods",23618263,closed,0,,,6,2019-09-03T20:41:42Z,2019-09-05T05:49:36Z,2019-09-05T04:22:24Z,CONTRIBUTOR,,0,pydata/xarray/pulls/3278,"<!-- Feel free to remove check-list items aren't relevant to your change -->

I feel like there's room for improvement in the docstrings, any change or suggestion is welcome!

 - [x] Closes #319 
 - [x] Tests added
 - [x] Passes `black . && mypy . && flake8`
 - [x] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API
","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3278/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull
486153978,MDExOlB1bGxSZXF1ZXN0MzExNjYzOTg2,3271,Raise proper error for scalar array when coords is a dict,23618263,closed,0,,,3,2019-08-28T04:29:02Z,2019-08-29T17:23:20Z,2019-08-29T17:09:00Z,CONTRIBUTOR,,0,pydata/xarray/pulls/3271,"<!-- Feel free to remove check-list items aren't relevant to your change -->
As explained here https://github.com/pydata/xarray/pull/3159#discussion_r316230281 , when a user uses a scalar array to build a `DataArray` with `coords` given as a dictionary the error is not self explanatory.
```python
>>> xr.DataArray(np.array(1), coords={'x': np.arange(4), 'y': 'a'}, dims=['x'])
...
KeyError: 'x'
```

This PR makes sure that when `data` is a scalar array and `dims` is not empty, it sets the shape to `(0,)` to make it fail with the proper raise message 

```python
>>> xr.DataArray(np.array(1), coords={'x': np.arange(4), 'y': 'a'}, dims=['x'])
...
ValueError: conflicting sizes for dimension 'x': length 0 on the data but length 4 on coordinate 'x'
```

 - [x] Test updated
 - [x] Passes `black . && mypy . && flake8`
 - [ ] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API (is this needed for a change like this?)
","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3271/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull
472100381,MDExOlB1bGxSZXF1ZXN0MzAwNTc2Nzc4,3159,Initialize empty or full DataArray,23618263,closed,0,,,20,2019-07-24T06:21:50Z,2019-08-27T16:28:04Z,2019-08-26T20:36:36Z,CONTRIBUTOR,,0,pydata/xarray/pulls/3159,"<!-- Feel free to remove check-list items aren't relevant to your change -->
I attempted to implement what has been asked for in #277 as an effort to contribute to this project.
This PR adds the ability to initialize a DataArray with a constant value, including `np.nan`. Also, if `data = None` then it is initialized as `np.empty` to take advantage of its speed for big arrays.
```python
>> foo = xr.DataArray(None, coords=[range(3), range(4)])
>> foo
<xarray.DataArray (dim_0: 3, dim_1: 4)>
array([[4.673257e-310, 0.000000e+000, 0.000000e+000, 0.000000e+000],
       [0.000000e+000, 0.000000e+000, 0.000000e+000, 0.000000e+000],
       [0.000000e+000, 0.000000e+000, 0.000000e+000, 0.000000e+000]])
Coordinates:
  * dim_0    (dim_0) int64 0 1 2
  * dim_1    (dim_1) int64 0 1 2 3
```

 - [x] Closes #878, #277 
 - [x] Tests added
 - [x] Fully documented, including `whats-new.rst` for all changes and `api.rst` for new API

Regarding the tests, I am not sure how to test the creation of an empty DataArray with `data=None` since the values changes between calls of `np.empty`. This is the reason I only added the test for the constant value.","{""url"": ""https://api.github.com/repos/pydata/xarray/issues/3159/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,,13221727,pull