numbers2 = [10, 20, 3, 4, 5] Syntax of List extend() list1.extend(iterable) Theextend()method takes a single argument. iterable- such as list, tuple, string, or dictionary Theextend()doesn't return anything; it
extend()函数参数只能接受iterable(可迭代对象),由于int不属于可迭代对象,所以出错了,错误类型:TypeError 代码语言:javascript 代码运行次数:0 运行 AI代码解释 lt.extend(100) print(lt,len(lt)) 3、index(obj):返回列表中obj元素首次出现的位置;如果obj不存在于列表中,报错 count(obj):返回列表中obj元素一共出...
FunctionalityThe append() method in Python adds a single element to the end of the existing list.While the extend() method in Python appends several items to a list as individual items at the end of the list. OperationThe append () method adds the full input to the list as a single it...
4.1 list 将序列分解,与之相对的是‘’.jion(somelist) 4.2del语句删除元素 del x[2] 4.3分片赋值实际上是一种替换 5 列表方法 5.1append 在列表尾部追加新的对象 5.2count 统计某个元素在列表中出现的次数 5.3extend vs 连接 >>> a = [1,2,3] >>> b = [4,5,6] >>> c = [1,2,3] >>> ...
List VS Tuple 共同点 List和Tuple都是Python的内置类型,都可以保存数据集合,都可以保存复合数据,都可以用index方法对其进行索引。 List 为什么列表(List)会被经常使用? 就是因为列表的对象方法多,能增、能减、能查、能数、能切、能排、甚至能用+号对其进行相加... ...
In the list of project template results, select Empty project, and select Next. In the Configure your new project dialog, enter the Project name: For the first project, enter the name superfastcode. For the second project, enter the name superfastcode2. Select Create.Be...
2、引用 VS 拷贝: (1)没有限制条件的分片表达式(L[:])能够复制序列,但此法只能浅层复制。 (2)字典 copy 方法,D.copy() 能够复制字典,但此法只能浅层复制 (3)有些内置函数,例如 list,能够生成拷贝 list(L) (4)copy 标准库模块能够生成完整拷贝:deepcopy 本质上是递归 copy ...
',list1) list2 = [ 'coco', 20]list1.extend(list2) print( list1)list1.insert(1...
Therefore, the final list has three elements—the two initial strings and one list object. This may not be what you intended if you wanted to grow the list with the contents of the iterable..extend(iterable)The .extend() method also adds items to the end of a list. However, the ...
字典VS 列表 1.都是可变对象 2. 索引方式不同,列表用整数索引,字典用键索引 3.字典的插入,删除,修改数据的速度可能会快于列表(重要) 4.列表的存储是有序的,字典的存储是无序的 可变的数据类型有四种: list列表、dict字典 set集合、bytearray字节数组 ...