code: def dot():
      if randrange(2):
          return "."
      return ""
  
imports: from random import randrange, sample
  from fractions import Fraction
  from randfloat import un_randfloat, bin_randfloat, tern_randfloat
label_desc: Use image node_id 4 for calling a global function with example usage: dot() and returns: str, str