code: def arguments():
      
  
      DESCRIPTION = """\
      """
  
      parser = argparse.ArgumentParser(description=DESCRIPTION, formatter_class=Raw)
  
      parser.add_argument("--email", dest="email", action='store', required=False, default=False,
                          help="An email address is required for querying Entrez databases.")
  
      parser.add_argument("--api", dest="api_key", action='store', required=False, default=False,
                          help="A users ENTREZ API Key. Will speed up download.")
  
      parser.add_argument("--query", dest="query", action='store', required=True,
                          help="Query to submit to Entrez.")
  
      parser.add_argument("--host", dest="host", action='store', required=False, default='localhost',
                          help="Location of an already running database.")
  
      parser.add_argument("--port", dest="port", action='store', type=int, required=False, default=27017,
                          help="Mongo database port.")
  
      parser.add_argument("--db", dest="db", action='store', required=False, default='sramongo',
                          help="Name of the database.")
  
      parser.add_argument("--debug", dest="debug", action='store_true', required=False,
                          help="Turn on debug output.")
  
      parser.add_argument("--force", dest="force", action='store_true', required=False,
                          help="Forces clearing the cache.")
  
      args = parser.parse_args()
  
      if not (args.email or args.api_key):
          logger.error('You must provide either an `--email` or `--api`.')
          sys.exit()
  
      return args
docs: Pulls in command line arguments.