'Requires:
nothing
Returns:
nothing
Logic:
Check each value in the newly creatd options list to see if it
matches what the user describes as a legal option.'

def __is_legal_option_func(self):

    illegal_options = []
    for arg in self.__system_string:
        if ('=' in arg):
            temp_list = arg.split('=')
            arg = temp_list[0]
        if ((arg not in self.__legal_options) and (arg[0] == '-')):
            illegal_options.append(arg)
    if illegal_options:
        self.__options_okay = 0
        sys.stderr.write('The    following    options    are    not    permitted:\n')
        for not_legal in illegal_options:
            sys.stderr.write(('%s\n' % not_legal))
