def extend_line(line, *args):
    """Add elements to a line, separated by tabs

    Parameters:
    line (str):     Line that *args will be added to for tsv format
    args (str):     Elements to add to line

    Returns:
    new_line (str):
                    Input line extended with *args
    """

    new_line = line.strip()
    for i in args:
        new_line = new_line + "\t" + str(i)
    return new_line + "\n"