lstm_tagger.py 文件源码

python
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项目:depccg 作者: masashi-y 项目源码 文件源码
def __init__(self, model_path, word_dim=None, afix_dim=None,
            nlayers=2, hidden_dim=128, relu_dim=64, dropout_ratio=0.5):
        self.model_path = model_path
        defs_file = model_path + "/tagger_defs.txt"
        if word_dim is None:
            self.train = False
            Param.load(self, defs_file)
            self.extractor = FeatureExtractor(model_path)
        else:
            self.train = True
            p = Param(self)
            p.word_dim = word_dim
            p.afix_dim = afix_dim
            p.hidden_dim = hidden_dim
            p.relu_dim = relu_dim
            p.nlayers = nlayers
            p.dump(defs_file)

        self.targets = read_model_defs(model_path + "/target.txt")
        self.words = read_model_defs(model_path + "/words.txt")
        self.suffixes = read_model_defs(model_path + "/suffixes.txt")
        self.prefixes = read_model_defs(model_path + "/prefixes.txt")
        self.in_dim = self.word_dim + 8 * self.afix_dim
        self.dropout_ratio = dropout_ratio
        super(LSTMTagger, self).__init__(
                emb_word=L.EmbedID(len(self.words), self.word_dim),
                emb_suf=L.EmbedID(len(self.suffixes), self.afix_dim, ignore_label=IGNORE),
                emb_prf=L.EmbedID(len(self.prefixes), self.afix_dim, ignore_label=IGNORE),
                lstm_f=L.NStepLSTM(nlayers, self.in_dim, self.hidden_dim, 0.),
                lstm_b=L.NStepLSTM(nlayers, self.in_dim, self.hidden_dim, 0.),
                linear1=L.Linear(2 * self.hidden_dim, self.relu_dim),
                linear2=L.Linear(self.relu_dim, len(self.targets)),
                )
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