issues: 689384366
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| 689384366 | MDU6SXNzdWU2ODkzODQzNjY= | 4393 | Dimension attrs lost when creating new variable with that dimension | 13837821 | closed | 0 | 2 | 2020-08-31T17:52:01Z | 2020-09-10T17:37:07Z | 2020-09-10T17:37:07Z | CONTRIBUTOR | What happened: When creating a new variable based on an existing dimension, the attrs of the dimension are lost. What you expected to happen: The attrs should be preserved. Minimal Complete Verifiable Example: ```python import xarray as xr ds = xr.Dataset() ds['x'] = xr.DataArray(range(10), dims='x') ds['y'] = xr.DataArray(range(len(ds['x'])), dims='x') ds['x'].attrs['foo'] = 'bar' print(ds['x']) # attrs of ds['x'] are preserved print('\n****\n') ds = xr.Dataset() ds['x'] = xr.DataArray(range(10), dims='x') ds['x'].attrs['foo'] = 'bar' ds['y'] = xr.DataArray(range(len(ds['x'])), dims='x') print(ds['x']) # attrs of ds['x'] are lost ``` Output of above code: ``` <xarray.DataArray 'x' (x: 10)> array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]) Coordinates: * x (x) int64 0 1 2 3 4 5 6 7 8 9 Attributes: foo: bar <xarray.DataArray 'x' (x: 10)> array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]) Coordinates: * x (x) int64 0 1 2 3 4 5 6 7 8 9 ``` Environment: Output of <tt>xr.show_versions()</tt>INSTALLED VERSIONS ------------------ commit: None libhdf5: 1.10.5 libnetcdf: 4.7.4 xarray: 0.16.0 pandas: 1.0.3 numpy: 1.19.1 scipy: 1.3.1 netCDF4: 1.5.3 pydap: None h5netcdf: 0.8.0 h5py: 2.10.0 Nio: None zarr: None cftime: 1.2.1 nc_time_axis: None PseudoNetCDF: None rasterio: 1.1.3 cfgrib: None iris: None bottleneck: 1.3.2 dask: 2.18.1 distributed: 2.25.0 matplotlib: 3.2.1 cartopy: 0.18.0 seaborn: 0.10.0 numbagg: None pint: 0.15 setuptools: 49.6.0.post20200814 pip: 19.2.2 conda: 4.8.4 pytest: 5.4.1 IPython: 7.14.0 sphinx: None None |
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completed | 13221727 | issue |