class_docstr: A fully-connected neural network for digit classification.
  
      
code: def __call__(self, x):
      h1 = F.relu(self.l1(x))
      h2 = F.relu(self.l2(h1))
      return self.l3(h2)
  
imports: from __future__ import print_function
  import argparse
  import warnings
  import numpy
  import chainer
  import chainer.functions
  import chainer.links
  from chainer import static_code
  from chainer import static_graph
  from chainer import training
  from chainer.training import extensions
  import chainerx
  import matplotlib
label_desc: Use image node_id 2 for calling the MLP obj's underlying member method code with example usage: obj.__call__(x) and returns: self