code: def _gradients_get_scale_factor(self):
      return self._get_gradient_at_activation(
          self._get_input_activation_vars()
      )
  
imports: from __future__ import division
  from __future__ import print_function
  from __future__ import absolute_import
  from .core import SingleInputMixin, OneDimOutputMixin, Node, ScoringMode, NonlinearMxtsMode
  import tensorflow
  from deeplift.util import NEAR_ZERO_THRESHOLD
  from deeplift.layers import helper_functions
label_desc: Use image node_id 9 for calling the Activation obj's underlying member method code with example usage: obj._gradients_get_scale_factor() and returns: self