code: def bench5(x):
      """A benchmark function for test purposes.
  
          f(x) = float(x[0]) ** 2 + x[1] ** 2
  
      where x is a string. It has a single minima with f(x) = 0 at x[0] = "0"
      and x[1] = "0"
      This benchmark is used for checking support of mixed spaces.
      """
      return float(x[0]) ** 2 + x[1] ** 2
  
file_path: guildai/guild/_skopt/benchmarks.py
imports: import numpy
label_desc: Use image node_id 6 for calling a global function with example usage: bench5(x) and returns: unknown