class_docstr: Keras classifier has the following attributes:
  
  Attributes:
      _model: the compiled keras classifier
      _input:  input placeholder of the model
      _output: output placeholder of the model
      _nb_classes:  number of outputs (e.g. binary classifier has 1 output)
      _input_shape: shape of 1 input sample
code: def predictsym(self, x):
      return self._model(x)
  
imports: import abc
  import sys
  import numpy
  import torch
label_desc: Use image node_id 5 for calling the KerasClassifier obj's underlying member method code with example usage: obj.predictsym(x) and returns: self