Download NCBI's gene2go. Return annotations for user-specified taxid(s).

def get_assoc_ncbi_taxids(taxids, force_dnld=False, loading_bar=True, **kws):
    """Download NCBI's gene2go. Return annotations for user-specified taxid(s)."""
    fin = kws['gene2go'] if 'gene2go' in kws else os.path.join(os.getcwd(), "gene2go")
    dnld_ncbi_gene_file(fin, force_dnld, loading_bar=loading_bar)
    return read_ncbi_gene2go(fin, taxids, **kws)