5.2 `del` 语句

There is a way to remove an item from a list given its index instead of its value: the del statement. This can also be used to remove slices from a list (which we did earlier by assignment of an empty list to the slice). For example:

有一个方法可从链表中删除指定索引的元素：del语句。这个方法也可以从链表中删除切片（之前我们是把一个空链表赋给切片）。例如：

>>> a = [-1, 1, 66.6, 333, 333, 1234.5]
>>> del a[0]
>>> a
[1, 66.6, 333, 333, 1234.5]
>>> del a[2:4]
>>> a
[1, 66.6, 1234.5]

del can also be used to delete entire variables:

del 也可以用于删除整个变量：

>>> del a

Referencing the name a hereafter is an error (at least until another value is assigned to it). We'll find other uses for del later.

此后再引用这个名字会发生错误（至少要到给它赋另一个值为止）。后面我们还会发现del的其它用法。

5.2 del 语句

5.2 `del` 语句