class_docstr: Base class for classifiers (image, tabular data, etc.)
  The base class is meant to be framework independent so that each
  framework specific classes (keras, torch, etc.) could inherit and
  implement these methods.
docstr: Returns the shape of one input to the classifier
docstr_tok: ["Returns","the","shape","of","one","input","to","the","classifier"]
code: def input_shape(self):
      """
      Returns the shape of one input to the classifier
      """
      return self._input_shape
  
imports: import abc
  import sys
  import numpy
  import torch
label_desc: Use image node_id 4 for calling the BaseClassifier obj's underlying member method code with example usage: obj.input_shape() and returns: self