When a class definition is entered, a new namespace is created, and used as the local scope -- thus, all assignments to local variables go into this new namespace.
When a class definition is entered, a new namespace is created, and used as the local scope -- thus, all assignments to local variables go into this new namespace.
定义一个类的时候，会创建一个新的命名空间，将其作为局部作用域使用——因此，所以对局部变量的赋值都引入新的命名空间。