[Python知识库]python 列表操作学习笔记 拿来把你！简单易懂

# 列表的增加     append加入在末尾
hero = ["韩信","老夫子","LAN"]
hero.append("LB")
hero.append("元芳")
print(hero)   # output:['韩信', '老夫子', 'LAN', 'LB', '元芳']

# 插入    插入到指定索引的位置
hero = ["韩信","老夫子","LAN"]
hero.insert(2,"yasuo")
print(hero)     # output:['韩信', '老夫子', 'yasuo', 'LAN']

# 合并
hero = ["韩信","老夫子","LAN"]
LOL = ["luo","xia","eyu"]
hero.append(LOL)
print(hero)     # output:['韩信', '老夫子', 'LAN', ['luo', 'xia', 'eyu']]

# 嵌套
hero = ["韩信","老夫子","LAN"]
hero.insert(2,["luo","xia","eyu"])
print(hero) # output: ['韩信', '老夫子', ['luo', 'xia', 'eyu'], 'LAN']
print(hero[2][1])   # output: xia

# 删除    del  pop  remove
hero = ["韩信","老夫子","LAN"]
del hero[2]    # 删除指定索引上的值
print(hero)     # output: ['韩信', '老夫子']

hero = ["韩信","老夫子","LAN"]
hero.pop()  # 默认删除最后一个
print(hero)     # output：['韩信', '老夫子']
hero.pop(1)
print(hero)     # output：['韩信']

hero = ["韩信","老夫子","LAN","monkey","LAN"]
hero.remove("LAN")  # 删除第一个查找到的值
print(hero)     # output：['韩信', '老夫子', 'monkey', 'LAN']

# clear 清空
hero = ["韩信","老夫子","LAN","LAN"]
hero.clear()
print(hero) # output：[]

# 修改
hero = ["韩信","老夫子","LAN"]
hero[0] = "LB"
hero[-1] = "剑姬"
print(hero)     # ['LB', '老夫子', '剑姬']

# 查找
hero = ["韩信","老夫子","LAN","老夫子"]
print(hero.index("LAN"))    # 2
print(hero.count("老夫子"))    # 2
item = "老夫子"
if item in hero:    # 先判断在不在列表
    n = hero.index(item)    # 取索引
    print(n)
    hero[n] = "LB"  #修改
print(hero)     # ['韩信', 'LB', 'LAN', '老夫子']