一、什么是元组？ 有序列表叫元组：tuple。tuple和list非常类似，但是tuple一旦初始化就不能修改。 Python的元组与列表类似，不同之处在于元组的元素不能修改。元组使用小括号，列表使用方括号。元组创建很简单，只需要在括号中添加元素，并使用逗号隔开即可。

The core of the Python data model architecture is the special methods (also known as 'magic methods'). These methods, which ...

The core of the Python data model architecture is special methods (also known as "magic methods"). These methods, which start ...