rename netcdf global attribute using xarray in python

Question

Is there a way to rename global attribute names using xarray? The rename command only seems to rename variables and dimensions and not global attributes. I tried this:

with util.open_or_die('AA.nc', perm='r+') as hndl_nc:
    hndl_nc.rename({'src_name': 'dst_name'}, inplace=True)

But I get this error:

AttributeError: NetCDF: Attribute not found

Michael Delgado · Accepted Answer · 2018-12-27 23:50:05Z

1

The xarray attrs attribute (which holds the attributes you're accessing) is simply an OrderedDict. There's no method in xarray that explicitly allows this behavior, but the attrs can be modified directly, e.g.:

hndl_nc.attrs['dst_name'] = hndl_nc.attrs.pop('src_name')

answered Dec 27, 2018 at 23:50

Michael Delgado

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2 Comments

user308827 Over a year ago

thanks @delgadom! is there a way I can delete an attrs as well? e.g. delete dst_name instead of renaming it?

Michael Delgado Over a year ago

attrs.pop removes and returns the value of dst_name. So there shouldn't be any value for dst_name after this line. If you just to remove it you could just use the later half of the line.

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