列表

列表的增删改查

增

names = ["马云","比尔·盖茨","扎克伯格","杰夫·贝索斯"]
names.append("马化腾")    
print(names)
======================
['马云', '比尔·盖茨', '扎克伯格', '杰夫·贝索斯', '马化腾']

names = ["马云","比尔·盖茨","扎克伯格","杰夫·贝索斯"]
names.insert(1,"张志强")
print(names)
===================
['马云', '张志强', '比尔·盖茨', '扎克伯格', '杰夫·贝索斯']

 

删

names = ["马云","比尔·盖茨","扎克伯格","杰夫·贝索斯"]
names.remove("杰夫·贝索斯")
print(names)
=============

['马云', '比尔·盖茨', '扎克伯格']

names = ["马云","比尔·盖茨","扎克伯格","杰夫·贝索斯"]
del names[-1]
print(names)
==============
['马云', '比尔·盖茨', '扎克伯格']

names = ["马云","比尔·盖茨","扎克伯格","杰夫·贝索斯"]
names.pop(0)      #不输入序号会默认删除最后一个
print(names)
================
['比尔·盖茨', '扎克伯格', '杰夫·贝索斯']

改

names = ["马云","比尔·盖茨","扎克伯格","杰夫·贝索斯"]
names[1] = "张志强"
print(names)
===============
['马云', '张志强', '扎克伯格', '杰夫·贝索斯']

查

names = ["马云","比尔·盖茨","扎克伯格","杰夫·贝索斯"]
print(names)
print(names.index("马云"))
=====================

['马云', '比尔·盖茨', '扎克伯格', '杰夫·贝索斯']
0

 copy

names = ["马云","比尔·盖茨","扎克伯格","杰夫·贝索斯"]
print(names)
names2 = names.copy()
print(names2)

names[0] = "马化腾"
print(names)

=============
['马云', '比尔·盖茨', '扎克伯格', '杰夫·贝索斯']
['马云', '比尔·盖茨', '扎克伯格', '杰夫·贝索斯']
['马化腾', '比尔·盖茨', '扎克伯格', '杰夫·贝索斯']