def get_authors_by_keyword(keyword: str, graph=None, authors=None) -> Set[str]:
    """Get authors for whom the search term is a substring.
    
    :param pybel.BELGraph graph: A BEL graph
    :param keyword: The keyword to search the author strings for
    :param set[str] authors: An optional set of pre-cached authors calculated from the graph
    :return: A set of authors with the keyword as a substring
    """
    keyword_lower = keyword.lower()

    if authors is not None:
        return {
            author
            for author in authors
            if keyword_lower in author.lower()
        }

    if graph is None:
        raise ValueError('Graph not supplied')

    return {
        author
        for author in get_authors(graph)
        if keyword_lower in author.lower()
    }
def get_authors_by_keyword(keyword: str, graph=None, authors=None) -> Set[str]:
    """Get authors for whom the search term is a substring.
    
    :param pybel.BELGraph graph: A BEL graph
    :param keyword: The keyword to search the author strings for
    :param set[str] authors: An optional set of pre-cached authors calculated from the graph
    :return: A set of authors with the keyword as a substring
    """
    keyword_lower = keyword.lower()

    if authors is not None:
        return {
            author
            for author in authors
            if keyword_lower in author.lower()
        }

    if graph is None:
        raise ValueError('Graph not supplied')

    return {
        author
        for author in get_authors(graph)
        if keyword_lower in author.lower()
    }
def get_authors_by_keyword ( keyword : str , graph = None , authors = None ) -> Set [ str ] : keyword_lower = keyword . lower ( ) if authors is not None : return { author for author in authors if keyword_lower in author . lower ( ) } if graph is None : raise ValueError ( 'Graph not supplied' ) return { author for author in get_authors ( graph ) if keyword_lower in author . lower ( ) }
Get authors for whom the search term is a substring.
    
    :param pybel.BELGraph graph: A BEL graph
    :param keyword: The keyword to search the author strings for
    :param set[str] authors: An optional set of pre-cached authors calculated from the graph
    :return: A set of authors with the keyword as a substring
Get authors for whom the search term is a substring . : param pybel . BELGraph graph : A BEL graph : param keyword : The keyword to search the author strings for : param set [ str ] authors : An optional set of pre - cached authors calculated from the graph : return : A set of authors with the keyword as a substring