listをstackとして使う
>>> stack = [] >>> stack.append("aaa") >>> stack.append("bbb") >>> stack.append("ccc") >>> stack ['aaa', 'bbb', 'ccc'] >>> stack.pop() 'ccc' >>> stack ['aaa', 'bbb'] >>> stack.pop() 'bbb' >>> stack ['aaa'] >>> stack.pop() 'aaa' >>> stack []