代码问题

来源：6-7 数据处理-句子编码化处理（句子和向量之间的转换）

慕瓜2168979

2018-11-01

    if isinstance(max_features, int):
        count = sorted(list(count.items()), key=lambda x: x[1])
        if max_features is not None and len(count) > max_features:
            count = count[-int(max_features):]
        for w, _ in count:
            self.dict[w] = len(self.dict)
    else:
        for w in sorted(count.keys()):
            self.dict[w] = len(self.dict)

    self.fited = True
    这段代码什么意思？是什么作用？

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