列表的相关知识1

最基本需要掌握列表的增，删，改，查数,嵌套 (以下均为PyCharm演示）

1。增   append()形式

friends = ['xiaoming','xiaohong','狗哥','xiaohao','guoqi']
friends.append('小花')
print(friends)
['xiaoming','xiaohong','狗哥’，‘xiaohao','guoqi','小花']

增添到具体位置，也就是插入  insert( ,  )

friends.insert(3,'悠悠')
prient(friends)
['xiaoming','xiaohong','狗哥','悠悠','xiaohao','guoqi']

删除有两种形式

1.del XXX[]

del friends[3]
print(friends)
['xiaoming','xiaohong','狗哥’，'xiaohao','guoqi']

2.remove.()

friends.remove('xiaoming')
print(friends)
['xiaohong','狗哥','xiaohao','guoqi']

改：

friends[0] = '红果果’
print(friends)
['红果果','狗哥','xiaohao',guoqi']

查数：用到index()

t = friends.index('xiaohao')
print(t)
2

a = friends[3]
print(a)
'guoqi'

嵌套：

friends.append(['老赵','身高168','体重55'])
print.(friends)
['红果果','狗哥','xiaohao','guoqi',['老赵','身高168',''体重55']]
friends[4]
['老赵','身高168','体重55']
friends[4][1]
'身高168'