input: def command_line_subtitles_client():
      """This Python script provides a command-line interface to download subtitles for movies and TV shows. The script requires one or more release paths as arguments, and optional parameters include specifying the language and subtitle site. The available commands are "download", "exist", "test", "list", "help", and "version".
      
      Example:
      >>> command_line_subtitles_client()
      """
output:     import sys
      import argparse
  
      def download_subtitles(release_paths, language, site):
          print(f"Downloading subtitles for {release_paths} in {language} from {site}")
  
      def check_subtitles_exist(release_paths, language, site):
          print(f"Checking if subtitles exist for {release_paths} in {language} from {site}")
  
      def test_connection(site):
          print(f"Testing connection to {site}")
  
      def list_available_languages(site):
          print(f"Listing available languages from {site}")
  
      def display_help():
          print("Available commands: download, exist, test, list, help, version")
  
      def display_version():
          print("Subtitles Client Version 1.0")
  
      parser = argparse.ArgumentParser(description="Command-line subtitles client")
      parser.add_argument("command", choices=["download", "exist", "test", "list", "help", "version"], help="Command to execute")
      parser.add_argument("release_paths", nargs='*', help="Release paths for movies or TV shows")
      parser.add_argument("--language", default="en", help="Language for subtitles")
      parser.add_argument("--site", default="opensubtitles", help="Subtitle site to use")
  
      args = parser.parse_args()
  
      if args.command == "download":
          download_subtitles(args.release_paths, args.language, args.site)
      elif args.command == "exist":
          check_subtitles_exist(args.release_paths, args.language, args.site)
      elif args.command == "test":
          test_connection(args.site)
      elif args.command == "list":
          list_available_languages(args.site)
      elif args.command == "help":
          display_help()
      elif args.command == "version":
          display_version()