issue_comments: 818800250

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https://github.com/pydata/xarray/issues/5148#issuecomment-818800250 https://api.github.com/repos/pydata/xarray/issues/5148 818800250 MDEyOklzc3VlQ29tbWVudDgxODgwMDI1MA== 367900 2021-04-13T14:53:14Z 2021-04-13T14:55:03Z CONTRIBUTOR

This is also something that the backends will need to consider:

```python traceback

xr.DataArray(np.ones(5)).rename(dim_0=1).to_netcdf("/tmp/test.nc") ... /usr/lib/python3.9/site-packages/xarray/backends/netCDF4_.py in set_dimension(self, name, length, is_unlimited) 439 def set_dimension(self, name, length, is_unlimited=False): 440 dim_length = length if not is_unlimited else None --> 441 self.ds.createDimension(name, size=dim_length) 442 443 def set_attribute(self, key, value):

src/netCDF4/_netCDF4.pyx in netCDF4._netCDF4.Dataset.createDimension()

src/netCDF4/_netCDF4.pyx in netCDF4._netCDF4.Dimension.init()

TypeError: expected bytes, int found ` I guess they could either convert to string (which will result in a different array when loaded) or a better error message (netCDF files only support strings for dimension names`` or similar).

 
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