def test_twice_filter(): list_a = [1, 2, 3, 4, 5] x = filter(lambda m: m > 2, list_a) y = filter(lambda n: n < 4, x) print(list(y))if __name__ == '__main__': test_twice_filter()

结果：

ssh://root@250.250.250.250:250/usr/bin/python3.6 -u /home/dba/HAL_9000/dbAlertAPP/filters/misc_item_filter.py[3]

参考阅读：

Listing a filter object twice will return a blank list?