input: def list_directory_contents() -> None:
      """ Lists the contents of a directory.
      >>> list_directory_contents()
      file1.txt
      file2.txt
      directory1
      """
      import os
      directory_contents = os.listdir()
      for content in directory_contents:
          print(content)
output:     import os
      directory_contents = os.listdir()
      for content in directory_contents:
          print(content)