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/1240#issuecomment-682435326,https://api.github.com/repos/pydata/xarray/issues/1240,682435326,MDEyOklzc3VlQ29tbWVudDY4MjQzNTMyNg==,500246,2020-08-28T09:48:18Z,2020-08-28T09:48:56Z,CONTRIBUTOR,"I fixed my conda environment now (something was wrong as I appeared to have two xarray installations in parallel).  I still get the `KeyError` with latest xarray master and latest pandas master:

```
$ conda list | egrep -w '(pandas|xarray)'
pandas                    1.2.0.dev0+167.g1f35b0621          pypi_0    pypi
xarray                    0.16.1.dev65+g13caf96e          pypi_0    pypi
$ python mwe83.py
Traceback (most recent call last):
  File ""mwe83.py"", line 5, in <module>
    da.sel(time=da.coords[""time""][0])
  File ""/data/gholl/miniconda3/envs/py38/lib/python3.8/site-packages/xarray/core/dataarray.py"", line 1142, in sel
    ds = self._to_temp_dataset().sel(
  File ""/data/gholl/miniconda3/envs/py38/lib/python3.8/site-packages/xarray/core/dataset.py"", line 2096, in sel
    pos_indexers, new_indexes = remap_label_indexers(
  File ""/data/gholl/miniconda3/envs/py38/lib/python3.8/site-packages/xarray/core/coordinates.py"", line 395, in remap_label_indexers
    pos_indexers, new_indexes = indexing.remap_label_indexers(
  File ""/data/gholl/miniconda3/envs/py38/lib/python3.8/site-packages/xarray/core/indexing.py"", line 270, in remap_label_indexers
    idxr, new_idx = convert_label_indexer(index, label, dim, method, tolerance)
  File ""/data/gholl/miniconda3/envs/py38/lib/python3.8/site-packages/xarray/core/indexing.py"", line 189, in convert_label_indexer
    indexer = index.get_loc(
  File ""/data/gholl/miniconda3/envs/py38/lib/python3.8/site-packages/pandas/core/indexes/datetimes.py"", line 622, in get_loc
    raise KeyError(key)
KeyError: 0
$ cat mwe83.py 
import xarray as xr
import numpy as np
da = xr.DataArray([0, 1], dims=(""time"",), coords={""time"": np.array([0, 1], dtype=""M8[s]"")})
da.sel(time=slice(da.coords[""time""][0], da.coords[""time""][1]))
da.sel(time=da.coords[""time""][0])
```

Oops, by ""already have"" you meant it's already been reported, I thought you meant it had already been fixed.  All clear then.
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,204071440
https://github.com/pydata/xarray/issues/1240#issuecomment-682393298,https://api.github.com/repos/pydata/xarray/issues/1240,682393298,MDEyOklzc3VlQ29tbWVudDY4MjM5MzI5OA==,500246,2020-08-28T08:14:26Z,2020-08-28T08:14:26Z,CONTRIBUTOR,"This was closed and was solved for slicing, but not for element indexing:

```python
import xarray as xr
import numpy as np
da = xr.DataArray([0, 1], dims=(""time"",), coords={""time"": np.array([0, 1], dtype=""M8[s]"")})
da.sel(time=da.coords[""time""][0])
```

results in

```
Traceback (most recent call last):
  File ""mwe83.py"", line 4, in <module>
    da.sel(time=da.coords[""time""][0])
  File ""/data/gholl/miniconda3/envs/py38/lib/python3.8/site-packages/xarray/core/dataarray.py"", line 1142, in sel
    ds = self._to_temp_dataset().sel(
  File ""/data/gholl/miniconda3/envs/py38/lib/python3.8/site-packages/xarray/core/dataset.py"", line 2096, in sel
    pos_indexers, new_indexes = remap_label_indexers(
  File ""/data/gholl/miniconda3/envs/py38/lib/python3.8/site-packages/xarray/core/coordinates.py"", line 395, in remap_label_indexers
    pos_indexers, new_indexes = indexing.remap_label_indexers(
  File ""/data/gholl/miniconda3/envs/py38/lib/python3.8/site-packages/xarray/core/indexing.py"", line 270, in remap_label_indexers
    idxr, new_idx = convert_label_indexer(index, label, dim, method, tolerance)
  File ""/data/gholl/miniconda3/envs/py38/lib/python3.8/site-packages/xarray/core/indexing.py"", line 189, in convert_label_indexer
    indexer = index.get_loc(
  File ""/data/gholl/miniconda3/envs/py38/lib/python3.8/site-packages/pandas/core/indexes/datetimes.py"", line 622, in get_loc
    raise KeyError(key)
KeyError: 0
```

using xarray 0.15.2.dev64+g2542a63f (latest master).  I think it would be desirable that it works in both cases.  Should we reopen this issue or should I open a new?","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,204071440