old_contents: # This program says hello to Alice and Bob
  def hello(name):
      print('Hello ' + name)
  
  
  hello('Alice')
  hello('Bob')
  
new_contents: """Hello function 2.0
  
  This program uses a function with an input argument to say hello to Alice and Bob.
  
  """
  
  
  def hello(name: str) -> None:
      """Hello
  
      Says hello to a given name.
  
      Args:
          name: String containing name of person to say hello to.
  
      Returns:
          None. Prints out a statement.
      """
      print('Hello ' + name)
  
  
  def main():
      hello('Alice')
      hello('Bob')
  
  
  if __name__ == '__main__':
      main()
  
subject: Update P02_helloFunc2.py added docstrings and wrapped in main() function