class_docstr: An abstract class for computing distances between neural networks. 
docstr: Evaluates the distances by calling evaluate. 
docstr_tok: ["Evaluates","the","distances","by","calling","evaluate","."]
code: def __call__(self, X1, X2, *args, **kwargs):
      """Evaluates the distances by calling evaluate."""
      return self.evaluate(X1, X2, *args, **kwargs)
  
imports: import numpy
  from .None import neural_network
  from ..gp.kernel import ExpSumOfDistsKernel, SumOfExpSumOfDistsKernel
  from ..utils.oper_utils import opt_transport
label_desc: Use image node_id 2 for calling the NNDistanceComputer obj's underlying member method code with example usage: obj.__call__(X1, X2) and returns: self