can not import bert model

[JiahuiSophieHU]

Hi, I can not import call bert = bert.BERT(). How can I fix it? Thanks,

bert=bert.BERT() Traceback (most recent call last): File "", line 1, in File "/home/sophie/NLPGNN/nlpgnn/models/bert.py", line 31, in init self.maxlen = param.get("maxlen", maxlen)