code: def pyfunc():
      """Some pure python tests...
  
      >>> pyfunc()
      'pyfunc'
  
      >>> import os
  
      >>> 2+3
      5
  
      >>> for i in range(3):
      ...     print(i, end=' ')
      ...     print(i+1, end=' ')
      ...
      0 1 1 2 2 3
      """
      return "pyfunc"
  
imports: from __future__ import print_function
label_desc: Use image node_id 1 for calling a global function with example usage: pyfunc() and returns: str