code: def ENSO(b, x, y=0):
      b = read_params(b)
      pi = 3.141592653589793238462643383279
      model = b[0] + (
          b[1] * cos(2 * pi * x / 12)
          + b[2] * sin(2 * pi * x / 12)
          + b[4] * cos(2 * pi * x / b[3])
          + b[5] * sin(2 * pi * x / b[3])
          + b[7] * cos(2 * pi * x / b[6])
          + b[8] * sin(2 * pi * x / b[6])
      )
      return model - y
  
imports: import os
  from numpy import arctan, array, cos, exp, log, sin
  from lmfit import Parameters
label_desc: Use image node_id 6 for calling a global function with example usage: ENSO(b, x, y) and returns: unknown