class_docstr: Convert between text-label and text-index 
class_docstr_tok: ["Convert","between","text-label","and","text-index"]
code: def __init__(self, label_list=None, key=None, **kwargs):
      super(ClsPostProcess, self).__init__()
      self.label_list = label_list
      self.key = key
  
imports: import paddle
label_desc: Use image node_id 1 to create a new ClsPostProcess object from inherited base classes: object with example: obj = ClsPostProcess(label_list, key)