使用列表理解:
res_list = [x[0] for x in rows]
下面是一个演示:
>>> rows = [(1, 2), (3, 4), (5, 6)]
>>> [x[0] for x in rows]
[1, 3, 5]
>>>
或者,您可以使用拆包代替x[0]
:
res_list = [x for x,_ in rows]
下面是一个演示:
>>> lst = [(1, 2), (3, 4), (5, 6)]
>>> [x for x,_ in lst]
[1, 3, 5]
>>>