属性错误

[Sniper-LZX]

老师您好，我从pyltp0.2.1转为0.4.0后出现的这个问题是否有好的解决办法，或是有什么学习区别的途径

Traceback (most recent call last):
File "F:/NLP_Project/TriplesExtract/sentence_parser.py", line 108, in
words, postags, child_dict_list, roles_dict, format_parse_list = parse.parser_main(sentence)
File "F:/NLP_Project/TriplesExtract/sentence_parser.py", line 100, in parser_main
child_dict_list, format_parse_list = self.build_parse_child_dict(words, postags, arcs)
File "F:/NLP_Project/TriplesExtract/sentence_parser.py", line 72, in build_parse_child_dict
if arcs[arc_index].head == index+1:
AttributeError: 'tuple' object has no attribute 'head'