code: def f6(x):
      v = _f6_cache.get(x, None)
      if v is None:
          if x > 1:
              v = random()
          elif x < 1:
              v = -random()
          else:
              v = 0
          _f6_cache[x] = v
      return v
  
imports: from random import random
  import numpy
  from scipy.optimize import zeros
label_desc: Use image node_id 12 for calling a global function with example usage: f6(x) and returns: v