python-列表和切片

列表和列表切片:

1 name = ["a","b","c","d"]
2 #从0开始数
3 print(name)
4 print(name[0])#第0个
5 print(name[0:3])#第0个到第2个 = print(name[:3])
6 print(name[2:])#第2个到最后
7 print(name[-1])#最后一个

View Code

增删改查：

name = ["a","b","c","d"]
name.append("Elif") #增加
name.insert(1,"decie")#插入
name[2] = "222"#改
# name.remove("222")
# print(name)

# del name[1]
# print(name)

#del name[1] = name.pop[1]
# name.pop()#不输入下标，默认删除最后一个
# print(name)

#查
print(name.index("222"))#获得索引
# print(name[name.index("222")])#通过索引获得值
print(name.count("222"))#统计
# name.clear()#清空
name.reverse()#反转
name.sort()#排序,按照ASCII码顺序来排列
name2 = [1,2,3,4]
name.extend(name2)#合并列表
print(name,name2)

python-列表和切片

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