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
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...
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 ...
In general,append()is the most efficient method for adding a single element to the end of a list.extend()is suitable for adding multiple elements from an iterable.insert()is the least efficient due to the need to shift elements to make space for the new element. The+operator creates a n...
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 ...
empty_list = []动态数组性质 列表在Python中扮演着动态数组的角色。这意味着它的容量并非固定不变，而是可以根据需要自动调整。当你向列表中添加更多元素时，它会悄无声息地扩大“口袋”；反之，若移除元素，它又能适时地收缩，避免浪费宝贵的内存空间。这种特性使得列表成为处理大量不确定数量数据的理想选择。可变性...
/* 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 ...
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, '...
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:...