all_combos_agg: ignore producing certain subtotals from column list

[rachelekren]

Description

See code below.
Say you want to not keep the subtotals of certain combinations in all_combos_agg.
Is there a way to send in certain columns so that rows with their subtotals are never produced (hopefully saving some processing time and RAM).

Maybe make a new parameter for this like "ignore_subtotals_cols"?

groupvars_sosbak = {
    'foreldreutd': '00',
    'fylke': '0',
    'kjonn': '0',
    'tid': 'SLETT MEG',
    'prove': 'SLETT MEG',
    'mnivaa': 'SLETT MEG',
    'klassetrinn': 'SLETT MEG',
}
statvar = {
    "elever": "sum",
    "skalapoeng": "mean",
}

all_combos_agg(
        nasjprov_data,
        groupcols=list(groupvars_sosbak.keys()),
        aggargs=statvar,
        fillna_dict=groupvars_sosbak,
        keep_empty=True
    )