对一组数字进行分类，将奇数放入一个列表中，将偶数放入另一个列表中。


[1, 2, 3, 4, 5, 6, 7, 8, 9]
可以使用列表推导式来完成此任务：
```
numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9]
odd_numbers = [num for num in numbers if num % 2 != 0]
even_numbers = [num for num in numbers if num % 2 == 0]
```
输出的结果会是：
```
odd_numbers = [1, 3, 5, 7, 9]
even_numbers = [2, 4, 6, 8]
```