to_xarray: global_attrs has inconsistent behaviour

[pawel-wolff]

What happened?

Some types of global attributes specifications in the to_xarray method (global_attrs kwarg) are ignored.

What are the steps to reproduce the bug?

import earthkit.data as ekd

ds_fl = ekd.from_source("sample", "pl.grib")

ds = ds_fl.to_xarray(
    attrs_mode="fixed", 
    global_attrs=[
        {"centre_fixed": "_ecmf_"}, 
        lambda md: {"centre_callable": md.get("centre")}, 
        "centre", 
        "key=centreDescription", 
        {"centre_key": "key=centre"}, 
    ], 
)

ds.attrs

The current output is:

{'centre_callable': 'ecmf', 'centre_fixed': '_ecmf_'}

The excepted output is:

{'centre_callable': 'ecmf',
 'centre': 'ecmf',
 'centreDescription': 'European Centre for Medium-Range Weather Forecasts',
 'centre_key': 'ecmf',
 'centre_fixed': '_ecmf_'}

Version

main, latest (v0.16.1)

Platform (OS and architecture)

all

Relevant log output

Accompanying data

No response

Organisation

No response

[sandorkertesz]

Fixed by #787