'attr_name' is given.
    """

    def match_node_name(name):
      if not node_name:
        return True
      compiled_regex = re.compile(node_name)
      match = re.fullmatch(compiled_regex, name)
      return match is not None

    return any(
        node.attr.get(attr_name) == attr_val
        for node in nodes
        if node.op == op_name and match_node_name(node.name)
    )