如何在不修改数组本身的情况下更改从数组中获取的值？

arr = [1, 2, 3, 4, 5]
temp = arr[2]
temp = temp + 1
print(temp)  # 输出：4
print(arr)  # 输出：[1, 2, 3, 4, 5]

arr = [1, 2, 3, 4, 5]
new_arr = arr[:2] + [arr[2] + 1] + arr[3:]
print(new_arr)  # 输出：[1, 2, 4, 4, 5]
print(arr)  # 输出：[1, 2, 3, 4, 5]

def modify_value(arr, index, new_value):
    new_arr = arr.copy()
    new_arr[index] = new_value
    return new_arr

arr = [1, 2, 3, 4, 5]
new_arr = modify_value(arr, 2, arr[2] + 1)
print(new_arr)  # 输出：[1, 2, 4, 4, 5]
print(arr)  # 输出：[1, 2, 3, 4, 5]