def prepare_arg(argument):
    """Prepend dashes to conform with cli standards on arguments if necessary"""
    keyword, arg = argument.split("=")
    if len(keyword) == 1:
        keyword = "-" + keyword
    elif len(keyword) == 2 and keyword[0] == "-":
        pass
    elif keyword[:2] != "--":
        keyword = "--" + keyword
    return [keyword, arg]