code: def create(cls, value):
      
      if isinstance(value, bytes):
        value = value.decode('utf-8')
  
      if isinstance(value, str):
        comma_separated_exprs = cls._split_modifier_expr(value)
        if len(comma_separated_exprs) > 1:
          return cls.merge([cls.create(x) for x in comma_separated_exprs])
  
      action = cls.MODIFY
      appends = []
      filters = []
      if isinstance(value, cls):  # Ensure idempotency.
        action = value._action
        appends = value._appends
        filters = value._filters
      elif isinstance(value, (list, tuple)):  # Ensure we can handle list-typed default values.
        action = cls.REPLACE
        appends = value
      elif value.startswith('[') or value.startswith('('):
        action = cls.REPLACE
        appends = _convert(value, (list, tuple))
      elif value.startswith('+[') or value.startswith('+('):
        appends = _convert(value[1:], (list, tuple))
      elif value.startswith('-[') or value.startswith('-('):
        filters = _convert(value[1:], (list, tuple))
      elif isinstance(value, str):
        appends = [value]
      else:
        appends = _convert('[{}]'.format(value), list)
      return cls(action, list(appends), list(filters))
docs: Interpret value as either a list or something to extend another list with.
  
      Note that we accept tuple literals, but the internal value is always a list.
  
      :param value: The value to convert.  Can be an instance of ListValueComponent, a list, a tuple,
                    a string representation of a list or tuple (possibly prefixed by + or -
                    indicating modification instead of replacement), or any allowed member_type.
                    May also be a comma-separated sequence of modifications.
      :rtype: `ListValueComponent`