code: def cost(z):
      """Cost function."""
      return 0.1 + 0.9 / 4 * (
          z[0][0] / 9467.18
          + (z[0][1] / 9467.18) ** 2
          + float(z[1] == "ghij")
          + ((z[2][0] - 123.0) / (234.0 - 123.0)) ** 3
      )
  
imports: import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: cost(z) and returns: unknown