code: def run_from_cli():
      
  
      arg_parser = argparse.ArgumentParser(
          description='Read and write properties in a wp-config.php file. '
                      'Include a --value argument to set the value, omit it to '
                      'read the value of the specified key.',
          prog='python -m wpconfigr')
  
      arg_parser.add_argument('--filename',
                              help='wp-config.php filename',
                              required=True)
  
      arg_parser.add_argument('--key',
                              help='Property key',
                              required=True)
  
      arg_parser.add_argument('--value',
                              help='New property value',
                              required=False)
  
      arg_parser.add_argument('--log-level',
                              default='CRITICAL',
                              help='Log level',
                              required=False)
  
      arg_parser.add_argument('--set-true',
                              action='store_true',
                              help='Set the value as boolean true')
  
      arg_parser.add_argument('--set-false',
                              action='store_true',
                              help='Set the value as boolean false')
  
      args = arg_parser.parse_args()
  
      if args.set_true and args.set_false:
          arg_parser.error('Cannot set --set-true and --set-false.')
  
      if args.value and args.set_true:
          arg_parser.error('Cannot set --value and --set-true.')
  
      if args.value and args.set_false:
          arg_parser.error('Cannot set --value and --set-false.')
  
      basicConfig(level=str(args.log_level).upper())
  
      updater = WpConfigFile(filename=args.filename)
  
      if args.set_true:
          value = True
      elif args.set_false:
          value = False
      else:
          value = args.value
  
      if value is not None:
          updater.set(key=args.key, value=value)
      else:
          got = updater.get(key=args.key)
  
          if got:
              print(got)
docs: Perform an update instigated from a CLI.