def get_seqname(
        locus_text: str) -> str:
    """
    Args:
        locus_text:
            The LOCUS (i.e. header section) of genbank file

    Returns:
        The seqname of chromosome
    """
    line1 = locus_text[:locus_text.find('\n')]
    return line1[len('LOCUS'):].lstrip().split(' '*3)[0]