input: 
  import os
  
  def list_directory_contents():
      """
      Return a list of the names of all items in the current directory.
  
      >>> list_directory_contents()
      '.DS_Store'
      'Desktop'
      'Documents'
      'Downloads'
      """
      directory_contents = os.listdir()
      for content in directory_contents:
          print(content)
  
output:     directory_contents = os.listdir()
      for content in directory_contents:
          print(content)