code: def fun(self, x):
      E = (
          sin(3.0 * pi * x[0]) ** 2
          + (x[0] - 1.0) ** 2 * (1.0 + sin(3 * pi * x[1]) ** 2)
          + (x[1] - 1.0) ** 2 * (1.0 + sin(2 * pi * x[1]) ** 2)
      )
      return E
  
imports: import time
  import numpy
  from numpy import sin, cos, pi, exp, sqrt, abs
  from scipy.optimize import rosen
label_desc: Use image node_id 1 for calling the Levi obj's underlying member method code with example usage: obj.fun(x) and returns: E