class_docstr: A helper class to index into a parameter vector.
code: def get(self, vect, name):
      idxs, shape = self.idxs_and_shapes[name]
      return np.reshape(vect[idxs], shape)
  
imports: from __future__ import absolute_import
  from __future__ import print_function
  from builtins import range
  import autograd.numpy
  import autograd.numpy.random
  import autograd.scipy.signal
  from autograd import grad
  import data_mnist
label_desc: Use image node_id 3 for calling the WeightsParser obj's underlying member method code with example usage: obj.get(vect, name) and returns: np