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参考资料：序列标注算法评估模块 seqeval 的使用https://mp.weixin.qq.com/s/PUwGp4fTJj1d38_ZasjBPQ准确率: accuracy = 预测对的元素个数/总的元素个数查准率：precision = 预测正确的实体个数 / 预测的实体总个数召回率：recall = 预测正确的实体个数 / 标注的实体总个数F1值：F1 = 2 *准确率 * 召回率 / (准确率 + 召回率)pip install seqeval这个包将accuracy、pr

vocab.txt的两种来源网络PRETRAINED_VOCAB_ARCHIVE_MAP = { 'bert-base-uncased': "https://s3.amazonaws.com/models.huggingface.co/bert/bert-base-uncased-vocab.txt", 'bert-large-uncased': "https://s3.amazonaws.com/models.huggingface.co/bert/bert-large-uncas