| # 增加 append A =[1, 2, 3, 4] A.append(5) # 在数组末尾追加元素 print(A) # 删除 remove pop del A =[1, 2, 3, 4, 5, 1] A.remove(1) # 用于移除列表中某个值的第一个匹配项 # print(A.remove(1)) None print(A) # pop A =[1, 2, 3, 4, 5] A.pop() print(A.pop()) # 4 print(A) # [1, 2, 3] print(A.pop(1)) # 2 print(A) # [1, 3] # del A =[1, 2, 3, 2, 4, 5] delA[3] print(A) # [1, 2, 3, 4, 5] # 插入 insert A =[1, 2, 3, 4, 5] A.insert(3, 9) print(A) # [1, 2, 3, 9, 4, 5] # 查找 A =[1, 2, 3, 4, 5] if5inA: print(存在) A =[5, 1, 2, 3, 4, 5] print(A.index(5)) # 查找元素第一次出现的索引 # 修改 A =[1, 2, 3, 4, 5] A[1] =9 print(A) # [1, 9, 3, 4, 5] # 反转 A =[1, 2, 3, 4, 5] A.reverse() print(A) # [5, 4, 3, 2, 1] # 排序 A =[1, 2, 3, 4, 5, 0] # print(A.sort()) # None A.sort() # 升序 print(A) # [0, 1, 2, 3, 4, 5] A.sort(reverse=True) # 降序 print(A) # [5, 4, 3, 2, 1, 0] A2 =[1, 2, 3, 4, 5, 0] sorted(A2) # 不对原数组进行操作，开辟额外空间 print(A2) # [1, 2, 3, 4, 5, 0] print(sorted(A2)) # [0, 1, 2, 3, 4, 5] # 清空 clear A =[1, 2, 3, 4, 5] A.clear() print(A) # [] # 截取 a =[1, 2, 3, 4, 5, 6, 7, 8, 9] print(a[1:3:1]) # [2, 3] print(a[:7:2]) # [1, 3, 5, 7] print(a[::-1]) # [9, 8, 7, 6, 5, 4, 3, 2, 1] print(a[:-1]) # [1, 2, 3, 4, 5, 6, 7, 8] |
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