input: def list_directory_contents():
      """ List the contents of the current directory.
      >>> list_directory_contents()
      ['file1.txt', 'folder1', 'file2.txt', 'folder2']
      """
      import os
      directory_contents = os.listdir()
      return directory_contents
output:     import os
      directory_contents = os.listdir()
      return directory_contents