code: def getDistance(a, b):
      ret = reduce(
          lambda x, y: x + pow((a[y] - b[y]), 2), range(len(a)), 0.0
      )
      return math.sqrt(ret)
  
imports: import math, random
  from functools import reduce
label_desc: Use image node_id 3 for calling a global function with example usage: getDistance(a, b) and returns: math