Helper function to convert the mapping of int
    (pathway id -> list of gene ids) to the corresponding pathway
    names and gene identifiers.

def _update_pathway_definitions(crosstalk_corrected_index_map,
                                gene_row_names,
                                pathway_column_names):
    """Helper function to convert the mapping of int
    (pathway id -> list of gene ids) to the corresponding pathway
    names and gene identifiers.
    """
    corrected_pathway_definitions = {}
    for pathway_index, gene_indices in crosstalk_corrected_index_map.items():
        pathway = pathway_column_names[pathway_index]
        genes = set([gene_row_names[index] for index in list(gene_indices)])
        corrected_pathway_definitions[pathway] = genes
    return corrected_pathway_definitions