def blockIndentation(block):
            text = block.text()
            return text[:len(text) - len(text.lstrip())]
def usage_iter(root):
    root = os.path.abspath(root)
    root_size = get_folder_size(root)
    root_string = "{0}\n{1}".format(root, root_size)
    yield [root_string, None, root_size]