class_docstr: Input example of one audio sample.
class_docstr_tok: ["Input","example","of","one","audio","sample","."]
code: def __init__(
      self,
      guid: int,
      source: Union[list, str],
      label: Optional[str] = None,
  ):
      self.guid = guid
      self.source = source
      self.label = label
  
imports: import csv
  import io
  import os
  from typing import Dict, List, Optional, Tuple, Union
  import numpy
  import paddle
  from paddlehub.utils.utils import extract_melspectrogram
label_desc: Use image node_id 1 to create a new InputExample object from inherited base classes: object with example: obj = InputExample(guid, source, label)