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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def main():
 """ Main entry point - used for command line call """

    args = _parse_arg(CountryConverter().valid_class)
    coco = CountryConverter(additional_data=args.additional_data)
    converted_names = coco.convert(
        names=args.names,
        src=args.src,
        to=args.to,
        enforce_list=False,
        not_found=args.not_found)

    print(args.output_sep.join(
        [str(etr) for etr in converted_names] if
        isinstance(converted_names, list) else [str(converted_names)]))