issue_comments: 780900086

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https://github.com/pydata/xarray/issues/4826#issuecomment-780900086 https://api.github.com/repos/pydata/xarray/issues/4826 780900086 MDEyOklzc3VlQ29tbWVudDc4MDkwMDA4Ng== 39069044 2021-02-17T22:36:08Z 2021-02-17T22:36:08Z CONTRIBUTOR

I ran into this as well with the basic netcdf backends:

```python import xarray as xr

ds = xr.Dataset( data_vars={"foo":(["x"], [False, True, False])}, coords={"x": [1, 2, 3]}, ) ds.to_netcdf('test.nc') ds = xr.load_dataset('test.nc') print(ds.foo.dtype) ds.to_netcdf('test.nc') ds = xr.load_dataset('test.nc') print(ds.foo.dtype) Gives: bool int8 ```

 
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