code: def grad_descent_sqrt_iter(a):
      return lambda x: x - 0.05 * (x**2 - a)
  
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 2 for calling a global function with example usage: grad_descent_sqrt_iter(a) and returns: function