code: def ranfunc():
      """A function with some random output.
  
      Normal examples are verified as usual:
      >>> 1+3
      4
  
      But if you put '# random' in the output, it is ignored:
      >>> 1+3
      junk goes here...  # random
  
      >>> 1+2
      again,  anything goes #random
      if multiline, the random mark is only needed once.
  
      >>> 1+2
      You can also put the random marker at the end:
      # random
  
      >>> 1+2
      # random
      .. or at the beginning.
  
      More correct input is properly verified:
      >>> ranfunc()
      'ranfunc'
      """
      return "ranfunc"
  
imports: from __future__ import print_function
label_desc: Use image node_id 3 for calling a global function with example usage: ranfunc() and returns: str