class_docstr: Implementation of a postprocessor based on rounding classifier output.
code: def _check_params(self) -> None:
      if not isinstance(self.decimals, int) or self.decimals <= 0:
          raise ValueError(
              "Number of decimal places must be a positive integer."
          )
  
file_path: adversarial-robustness-toolbox/art/defences/postprocessor/rounded.py
imports: import logging
  import numpy
  from art.defences.postprocessor.postprocessor import Postprocessor
label_desc: Use image node_id 3 for calling the Rounded obj's underlying member method code with example usage: obj._check_params() without return types