是否有一行单行python代码来替换这个嵌套循环？

Question

变量:

rs = {
    'results': [
        {'addresses': [{'State': 'NY'}, {'State': 'IL'}]},
        {'addresses': [{'State': 'NJ'}, {'State': 'IL'}]}
    ]
}

我想获得每个结果成员的状态列表.目前我使用以下代码:

for y in rs['results']:
    for x in y['addresses']:
        phy_states.append(x['state'])

我想要的东西:

phy_states = [x['state'] for x in y['addresses'] for y in rs['results']]

但我不知道该怎么做.上面的一行代码不起作用,因为在赋值之前引用了局部变量y.

Answer 1

你几乎得到它,你只是相反:

phy_states = [x['State'] for y in rs['results'] for x in y['addresses']]