列表修改值
animals =["老虎","狮子","豹子","长颈鹿","大象"] print(animals) animals[0] = "东北虎" animals[2] = "猎豹" print(animals) 输出结果如下: ['老虎','狮子','豹子','长颈鹿','大象'] ['东北虎','狮子','猎豹','长颈鹿','大象']
列表添加元素
方法一:通过list.append(element)方法,可以给列表末尾添加元素
append 附加
animals = ["老虎","狮子","豹子","长颈鹿","大象"] print(animals) animals.append("斑马") animals.append("犀牛") print(animals) 输出结果如下: ['老虎','狮子','豹子','长颈鹿','大象'] ['老虎','狮子','豹子','长颈鹿','大象','斑马','犀牛']
方法二:经常会这么用:初始化一个空列表,后面再添加值到列表;例如读取文件的过程;
animals = [] print(animals) animals.append("斑马") animals.append("犀牛") print(animals) 输出结果如下: [] ['斑马','犀牛']
列表删除元素
通过list.remove(element)的语法,可以按值删除元素
remove 去除 去掉 element 元素
animals = ["老虎","狮子","豹子","长颈鹿","大象"] print(animals) animals.remove("狮子") animals.remove("长颈鹿") print(animals) 输出结果如下: ['老虎','狮子','豹子','长颈鹿','大象'] ['老虎','豹子','大象']