ECMWF, model ifs, product enfo, xarray produces list of dataset, not a dataset

[conbrad]

I'm looking to call pick_points on the xarray dataset returned by H.xarray for ECMWF, model ifs, product enfo, but it seems this returns a list of datasets (of length 2). This seems to be the only case where the return type is different although I haven't tested exhaustively.

e.g.

from herbie import Herbie
H = Herbie("2024-12-23", model="ifs", product="enfo")
ds = H.xarray(":2d:")
type(ds)

output:

list

[williamhobbs]

I think one item in the list is an xarray dataset with all 50 ensemble members, and the other is the mean of all members. I’m not 100% sure about the mean, so you may want to check that elsewhere.

See #369 for some related notes on the order of the returned datasets.