class_docstr: Any iterable of (label, text_input) pairs qualifies as a ``Dataset``.
class_docstr_tok: ["Any","iterable","of","(","label",",","text_input",")","pairs","qualifies","as","a","``","Dataset","``","."]
code: def __iter__(self):
      return self
  
imports: from tqdm import tqdm
  from ...common.utils import logger
  from ..component.sample import Sample, CnSample
  from ...common.utils.load import task_class_load
  from ...common.settings import SAMPLE_PATH, NLP_TASK_MAP
  from ...common.utils.file_io import read_csv, read_json, save_csv, save_json
label_desc: Use image node_id 2 for calling the Dataset obj's underlying member method code with example usage: obj.__iter__() and returns: self