html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/2495#issuecomment-431999869,https://api.github.com/repos/pydata/xarray/issues/2495,431999869,MDEyOklzc3VlQ29tbWVudDQzMTk5OTg2OQ==,2443309,2018-10-22T21:43:01Z,2018-10-22T21:43:01Z,MEMBER,"@max-sixty - thanks for bringing this full circle. After reading the prior issue, I agree, this is a fine behavior. ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,371990138
https://github.com/pydata/xarray/issues/2495#issuecomment-431973631,https://api.github.com/repos/pydata/xarray/issues/2495,431973631,MDEyOklzc3VlQ29tbWVudDQzMTk3MzYzMQ==,5635139,2018-10-22T20:32:48Z,2018-10-22T20:32:48Z,MEMBER,"Confirmed as fixed:

```python

In [1]: import xarray
impor
In [2]: import numpy

In [3]: xarray.DataArray(numpy.arange(3), dims=(""x"",), coords={""x"": {""a"", ""b"", ""c""}})
   ...:
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-3-6d18e1623a15> in <module>
----> 1 xarray.DataArray(numpy.arange(3), dims=(""x"",), coords={""x"": {""a"", ""b"", ""c""}})

~/workspace/xarray/xarray/core/dataarray.py in __init__(self, data, coords, dims, name, attrs, encoding, fastpath)
    225
    226             data = as_compatible_data(data)
--> 227             coords, dims = _infer_coords_and_dims(data.shape, coords, dims)
    228             variable = Variable(dims, data, attrs, encoding, fastpath=True)
    229

~/workspace/xarray/xarray/core/dataarray.py in _infer_coords_and_dims(shape, coords, dims)
     62     if utils.is_dict_like(coords):
     63         for k, v in coords.items():
---> 64             new_coords[k] = as_variable(v, name=k)
     65     elif coords is not None:
     66         for dim, coord in zip(dims, coords):

~/workspace/xarray/xarray/core/variable.py in as_variable(obj, name)
     88     elif isinstance(obj, (set, dict)):
     89         raise TypeError(
---> 90             ""variable %r has invalid type %r"" % (name, type(obj)))
     91     elif name is not None:
     92         data = as_compatible_data(obj)

TypeError: variable 'x' has invalid type <class 'set'>
```

The original issue is https://github.com/pydata/xarray/issues/1691, and includes why we raise rather than coerce to an array","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,371990138
https://github.com/pydata/xarray/issues/2495#issuecomment-431490100,https://api.github.com/repos/pydata/xarray/issues/2495,431490100,MDEyOklzc3VlQ29tbWVudDQzMTQ5MDEwMA==,5635139,2018-10-19T20:30:54Z,2018-10-19T20:30:54Z,MEMBER,I thought I fixed this. Please can you try on the latest version? Or I'll look when by a computer,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,371990138
https://github.com/pydata/xarray/issues/2495#issuecomment-431404087,https://api.github.com/repos/pydata/xarray/issues/2495,431404087,MDEyOklzc3VlQ29tbWVudDQzMTQwNDA4Nw==,2443309,2018-10-19T15:33:55Z,2018-10-19T15:33:55Z,MEMBER,"I agree this seems like a bug. In the case of a `set`, I think we should try to cast this to a list/array.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,371990138