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                [TOC] list列表,是有序的集合,和Javascript的數組類似 # 1.增加 append() 尾部添加 ~~~ arr =[1,2,3] arr.append(4) print(arr) //[1, 2, 3, 4] ~~~ insert(index,value) -- 在列表中固定的位置添加 ~~~ arr =[1,2,3] arr.insert(1,5) print(arr) //[1,5,2,3] ~~~ # 2.刪除 ### 2.1`del`刪除 ~~~ arr =[1,2,3] del arr[0] print(arr) //[2,3] ~~~ ### 2.2 pop() --下標刪除 >pop() 從后刪除 pop(index) 任意位置刪除 ~~~ arr =[1,2,3] arr.pop() print(arr) ~~~ ~~~ arr =[1,2,3] //刪除下標為2的元素 arr.pop(2) print(arr) //[1,2] ~~~ ### 2.3remove(value) -- 值刪除 ~~~ arr =[1,2,3] arr.remove(1) print(arr) //[2,3] ~~~ # 3.組織列表 ### 3.1排序 sort()永久排序 ~~~ arr =[1,2,3,7,5] arr.sort() print(arr) ~~~ sorted()--不改變列表的結構 ~~~ arr =[1,2,3,7,5] change = sorted(arr) print(arr) //[1, 2, 3, 7, 5] print(change) //[1, 2, 3, 5, 7] ~~~ reverse() -- 顛倒 ~~~ arr =[1,2,3,7,5] arr.reverse() print(arr) //[5, 7, 3, 2, 1] ~~~ len()--確定列表的長度 ~~~ arr =[1,2,3,7,5] len = len(arr) print(len) //5 ~~~ >Tip arr[-1] 從最后一位讀取
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