code: def Gauss(b, x, y=0):
      b = read_params(b)
      model = b[0] * exp(-b[1] * x) + (
          b[2] * exp(-((x - b[3]) ** 2) / b[4] ** 2)
          + b[5] * exp(-((x - b[6]) ** 2) / b[7] ** 2)
      )
      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 8 for calling a global function with example usage: Gauss(b, x, y) and returns: unknown