class_docstr: DataSource which loads data from TSV sources. Uses python's csv library.
class_docstr_tok: ["DataSource","which","loads","data","from","TSV","sources",".","Uses","python","'s","csv","library","."]
code: def raw_train_data_generator(self):
      return iter(self._train_tsv)
  
imports: import csv
  import logging
  import sys
  import threading
  from typing import Dict, List, Optional, Type
  from pytext.utils.path import get_absolute_path
  from .data_source import generator_property, RootDataSource, SafeFileWrapper, ShardedDataSource
  from .session import SessionDataSource
label_desc: Use image node_id 4 for calling the TSVDataSource obj's underlying member method code with example usage: obj.raw_train_data_generator() and returns: iter