python中insert()函数的用法_Python list insert()用法及代码示例

insert()是Python中的内置函数，可将给定元素插入列表中的给定索引。

用法:

list_name.insert(index, element)

参数：

index - the index at which the element has to be inserted.

element - the element to be inserted in the list.

返回值：

This method does not return any value but

it inserts the given element at the given index.

错误：

If anything other then a list is used with

insert(), then it returns an AttributeError.

注意：如果给定索引> = length(list)，则它将插入列表的末尾。

代码1：

# Python3 program for use

# of insert() method

list1 = [ 1, 2, 3, 4, 5, 6, 7 ]

# insert 10 at 4th index

list1.insert(4, 10)

print(list1)

list2 = ['a', 'b', 'c', 'd', 'e']

# insert z at the front of the list

list2.insert(0, 'z')