Removing xrange for python3

      prev_layer = self.mol_features

      prev_layer_size = num_features 

      for i in xrange(num_layers):

      for i in range(num_layers):

        # layer has shape [None, layer_sizes[i]]

        ########################################################## DEBUG

        print("Adding weights of shape %s" % str([prev_layer_size, layer_sizes[i]]))

        # Construct task bypass layer

        prev_bypass_layer = self.mol_features

        prev_bypass_layer_size = num_features

        for i in xrange(num_bypass_layers):

        for i in range(num_bypass_layers):

          # bypass_layer has shape [None, bypass_layer_sizes[i]]

          ########################################################## DEBUG

          print("Adding bypass weights of shape %s"

    """ 

    orig_dict = {}

    orig_dict["mol_features"] = X_b

    for task in xrange(self.n_tasks):

    for task in range(self.n_tasks):

      if y_b is not None:

        orig_dict["labels_%d" % task] = y_b[:, task]

      else: