print(result_list) 1. 这段代码将输出result_list列表的内容。 完整代码 下面是整个流程的完整代码示例: result_list=[]input_list=['1,2,3','4,5,6','7,8,9']forelementininput_list:split_elements=element.split(',')# 在这里对拆分的元素进行一些处理result_list.extend(split_elements)print(resul...
或data_list = list([1, 1.1, "123", None, b'123', 101 + 3j, True, (1, 2), [1, 2]]) 1. 2. 1.list.append:追加,默认追加到结尾 解释: Append object to the end of the list. 格式: def append(self, *args, **kwargs),list.append(追加内容) AI检测代码解析 date_list = list...
new_elem = [7, 8] my_2Dlist.extend([new_elem]) print(my_2Dlist) # [[1, 2], [3, 4], [5, 6], [7, 8]]Much like the append() method in the previous example, the extend() method adds the new element to the 2D list. The only difference you might notice is that we ...
其基本结构如下:new_list = [expression for item in iterable if condition]这里,expression 是对item进行操作或变换的表达式,iterable 是你要遍历的可迭代对象(如列表、字符串、range等),if condition 是可选的筛选条件。列表推导式就像一台高效的“数据加工厂” ,它从原料(iterable)中提取原料粒子(item)...
python数据类型之list 1、append:增加元素到列表尾部 1 L.append(object) -> None -- appendobjectto end 2、clear:清空列表中所有元素 3、count:返回列表中指定值的数量 1 L.count(value) -> integer --returnnumber of occurrences of value 4、extend:用列表扩展列表的元素...
new_elements=[6,7,8]my_list.extend(new_elements)print(my_list)# 输出: [1, 'apple', True, 3.14, [5, 6, 7], {'name': 'John', 'age': 30}, 6, 7, 8] 3.5拼接列表 使用+操作符来拼接列表: listNew=my_list[0:2]+my_list[3:4]+[my_list[5]]print(listNew)# 输出:[1, '...
append_method.py #!/usr/bin/python vals = [1, 2, 3, 4] vals.append(5) vals.append(6) print(vals) We have a list of integer values. We add new elements to the list with append. vals.append(5) vals.append(6) Two values are added at the end of the list. The append is a ...
向list中增加元素 >>> li ['a','b','mpilgrim','z','example']>>>li.append("new")>>> li ['a','b','mpilgrim','z','example','new']>>>li.insert(2,"new")>>> li ['a','b','new','mpilgrim','z','example','new']>>>li.extend(["two","elements"])>>> li ['a',...
insert()方法正式用于处理这种问题而来的。其语法结构是listname.insert(index, p_object)其中index表示指定位置的索引值,insert()会将p_object插入到listname列表第index个元素的位置。与append()方法相同的是,如果待添加的元素的是序列,则insert()会将该序列当成一个整体插入到列表的指定位置处。举个栗子:...
/* Vector of pointers to list elements. list[0] is ob_item[0], etc. */ PyObject **ob_item; /* ob_item contains space for 'allocated' elements. The number * currently in use is ob_size. * Invariants: * 0 <= ob_size <= allocated ...