class_docstr: 读取 **MSRA-NER** 数据，如果您要使用该数据，请引用以下的文章：
  
  Gina-Anne Levow, 2006, The Third International Chinese Language Processing Bakeoff: Word Segmentation and Named Entity Recognition.
      
  数据中的格式应该类似于下列的内容::
  
      把       O
      欧       B-LOC
  
      美       B-LOC
      、       O
  
      港       B-LOC
      台       B-LOC
  
      流       O
      行       O
  
      的       O
  
      食       O
  
      ...
  
  读取的 :class:`~fastNLP.core.DataSet` 将具备以下的数据结构：
  
  .. csv-table::
      :header: "raw_chars", "target"
  
      "['把', '欧'] ", "['O', 'B-LOC']"
      "['美', '、']", "['B-LOC', 'O']"
      "[...]", "[...]"
class_docstr_tok: ["\u8bfb\u53d6","*","*","MSRA-NER","*","*","\u6570\u636e\uff0c\u5982\u679c\u60a8\u8981\u4f7f\u7528\u8be5\u6570\u636e\uff0c\u8bf7\u5f15\u7528\u4ee5\u4e0b\u7684\u6587\u7ae0\uff1a","Gina-Anne","Levow",",","2006",",","The","Third","International","Chinese","Language","Processing","Bakeoff",":","Word","Segmentation","and","Named","Entity","Recognition",".","\u6570\u636e\u4e2d\u7684\u683c\u5f0f\u5e94\u8be5\u7c7b\u4f3c\u4e8e\u4e0b\u5217\u7684\u5185\u5bb9",":",":","\u628a","O","\u6b27","B-LOC","\u7f8e","B-LOC","\u3001","O","\u6e2f","B-LOC","\u53f0","B-LOC","\u6d41","O","\u884c","O","\u7684","O","\u98df","O","...","\u8bfb\u53d6\u7684",":","class",":","`","~fastNLP.core.DataSet","`","\u5c06\u5177\u5907\u4ee5\u4e0b\u7684\u6570\u636e\u7ed3\u6784\uff1a","..","csv-table",":",":",":","header",":","``","raw_chars","''",",","``","target","''","``","[","'","\u628a","'",",","'","\u6b27","'","]","``",",","``","[","'","O","'",",","'","B-LOC","'","]","''","``","[","'","\u7f8e","'",",","'\u3001","'","]","''",",","``","[","'","B-LOC","'",",","'","O","'","]","''","``","[","...","]","''",",","``","[","...","]","''"]
code: def __init__(self):
      super().__init__()
  
imports: import glob
  import os
  import random
  import shutil
  import time
  from typing import List
  from .loader import Loader
  from ..file_reader import _read_conll
  from fastNLP.core.dataset import DataSet, Instance
label_desc: Use image node_id 1 to create a new MsraNERLoader object from inherited base classes: CNNERLoader with example: obj = MsraNERLoader()