删除数组元素，自身内部改变

Js代码:

<script>
    let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9]
    let i = arr.length - 1
    while (i >= 0) {
        if (arr[i] === 3 || arr[i] === 5 || arr[i] === 6) {
            arr.splice(i, 1)
        }
        i--
    }
    console.log(arr)
</script>

Python代码:

arr = [1, 2, 3, 4, 5, 6, 7, 8, 9]  # 删除3，5，6
i = len(arr) - 1
while i >= 0:
    if arr[i] == 3 or arr[i] == 5 or arr[i] == 6:
        arr.remove(arr[i])
    i -= 1
print(arr)