code: def newton_sqrt_iter(a):
      return lambda x: 0.5 * (x + a / x)
  
file_path: autograd/examples/fixed_points.py
imports: from __future__ import print_function
  import autograd.numpy
  from autograd import grad
  from autograd.misc.fixed_points import fixed_point
label_desc: Use image node_id 1 for calling a global function with example usage: newton_sqrt_iter(a) and returns: function