issues: 313010564

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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
313010564 MDU6SXNzdWUzMTMwMTA1NjQ= 2049 Keeping attributes when using DataArray.astype 4180033 closed 0     5 2018-04-10T17:02:18Z 2020-08-19T20:34:35Z 2020-08-19T20:34:35Z NONE      

Hi all,

I was wondering whether there is an easier way to keep the attributes when using the DataArray.astype method?

```python import xarray as xr

DataArray with attributes

da = xr.DataArray( [[0, 1, 2], [0, 1, 2]], attrs={"attr1": "value1"} )

the attributes are not passed over to new_da

new_da = da.astype(float)

I have to set the attributes by myself

new_da.attrs = da.attrs.copy() ```

This is just one extra-line, but I have to keep track of the old DataArray and it may become unhandy if I do many astype calls.

Any hints?

Output of xr.show_versions()

INSTALLED VERSIONS ------------------ commit: None python: 3.6.4.final.0 python-bits: 64 OS: Linux OS-release: 3.16.0-4-amd64 machine: x86_64 processor: byteorder: little LC_ALL: None LANG: en_US.utf8 LOCALE: en_US.UTF-8 xarray: 0.10.2 pandas: 0.22.0 numpy: 1.14.2 scipy: 1.0.0 netCDF4: 1.3.1 h5netcdf: 0.5.0 h5py: 2.7.1 Nio: None zarr: None bottleneck: 1.2.1 cyordereddict: None dask: 0.17.2 distributed: 1.21.4 matplotlib: 2.2.2 cartopy: 0.16.0 seaborn: 0.8.1 setuptools: 39.0.1 pip: 9.0.1 conda: None pytest: 3.4.2 IPython: 6.2.1 sphinx: 1.7.1 
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   completed 13221727 issue

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