code: def rosenbrock(x, y, a=1, b=100):
      return (a - x) * (a - x) + b * (y - x * x) * (y - x * x)
  
imports: import sys
  import tensorflow
label_desc: Use image node_id 1 for calling a global function with example usage: rosenbrock(x, y, a, b) and returns: unknown