code: def attack(model, session, a):
      fgsm = FastGradientMethod(model, sess=session)
      image = a.original_image[np.newaxis]
      return fgsm.generate_np(image)
  
imports: import numpy
  from cleverhans.attacks import FastGradientMethod
  from robust_vision_benchmark import attack_server
  from utils import cleverhans_attack_wrapper
label_desc: Use image node_id 1 for calling a global function with example usage: attack(model, session, a) and returns: fgsm