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59 lines
1.2 KiB
59 lines
1.2 KiB
"""
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File: list.py
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Created Time: 2022-11-25
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Author: Krahets (krahets@163.com)
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"""
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"""Driver Code"""
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if __name__ == "__main__":
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# 初始化列表
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arr: list[int] = [1, 3, 2, 5, 4]
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print("列表 arr =", arr)
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# 访问元素
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num: int = arr[1]
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print("访问索引 1 处的元素，得到 num =", num)
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# 更新元素
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arr[1] = 0
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print("将索引 1 处的元素更新为 0 ，得到 arr =", arr)
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# 清空列表
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arr.clear()
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print("清空列表后 arr =", arr)
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# 尾部添加元素
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arr.append(1)
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arr.append(3)
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arr.append(2)
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arr.append(5)
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arr.append(4)
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print("添加元素后 arr =", arr)
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# 中间插入元素
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arr.insert(3, 6)
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print("在索引 3 处插入数字 6 ，得到 arr =", arr)
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# 删除元素
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arr.pop(3)
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print("删除索引 3 处的元素，得到 arr =", arr)
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# 通过索引遍历列表
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count: int = 0
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for i in range(len(arr)):
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count += 1
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# 直接遍历列表元素
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count: int = 0
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for n in arr:
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count += 1
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# 拼接两个列表
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arr1: list[int] = [6, 8, 7, 10, 9]
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arr += arr1
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print("将列表 arr1 拼接到 arr 之后，得到 arr =", arr)
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# 排序列表
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arr.sort()
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print("排序列表后 arr =", arr)
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