old_contents: #!/usr/bin/env python 
  
  # Import Python module 
  import os 
  
  def osCheck():
  	""""Check if OS is UNIX-like."""
  	if os.name !='posix': 
  		print "pyWipe will ONLY run on UNIX-like systems."
  	else: 
  		print "Let there be wipe!"
  
  osCheck()
  
new_contents: #!/usr/bin/env python3 
  
  # Import Python module 
  import os 
  
  def osCheck():
  	""""Check if OS is UNIX-like."""
  	if os.name =='posix': 
  		print('Let there be wipe!') 
  	else: 
  		print('NOT POSIX-compliant, can not proceed.')
  
  osCheck()
  
subject: update osCheck for Py 2 & 3