code: def residual(p):
      v = p.valuesdict()
      return (
          v["a1"] * np.exp(-x / v["t1"])
          + v["a2"] * np.exp(-(x - 0.1) / v["t2"])
          - y
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: residual(p) and returns: unknown