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 predict_long(self, x):
      prob = self.predict(x)
      predicted_class = np.argmax(prob)
      prob_str = np.array2string(prob).replace("\n", "")
      return (prob, predicted_class, prob_str)
  
imports: import abc
  import sys
  import numpy
  import torch
label_desc: Use image node_id 4 for calling the KerasClassifier obj's underlying member method code with example usage: obj.predict_long(x) and returns: prob,  predicted_class,  prob_str