Python：如何访问列表中具有特定键值的字典

I have a list of dictionaries:

我有一个词典列表：

[
{"START":"Denver", "END":"Chicago", "Num":0},
{"START":"Dallas", "END":"Houston", "Num":3},
{"START":"Virginia", "END":"Boston", "Num":1},
{"START":"Washington", "END":"Maine", "Num":7}
]
[