code: def ipyfunc():
      """Some IPython tests...
  
      In [1]: ipyfunc()
      Out[1]: 'ipyfunc'
  
      In [2]: import os
  
      In [3]: 2+3
      Out[3]: 5
  
      In [4]: for i in range(3):
         ...:     print(i, end=' ')
         ...:     print(i+1, end=' ')
         ...:
      Out[4]: 0 1 1 2 2 3
      """
      return "ipyfunc"
  
label_desc: Use image node_id 2 for calling a global function with example usage: ipyfunc() and returns: str