从嵌套字典Python创建值列表

你可以用3个 for 列表理解中的循环:

listionary = [
    {"a": [{"id": 30, "name": "bob"}, {"id": 50, "name": "mike"}]},
    {"b": [{"id": 99, "name": "guy"}, {"id": 77, "name": "hal"}]},
]

lst = [d["id"] for d in listionary for v in d.values() for d in v]
print(lst)

印刷品:

[30, 50, 99, 77]

说明:

for d in listionary -这将迭代列表中的所有项目 listionary ( {"a":...}, {"b":...} )

for v in d.values() -这将迭代这些字典中的所有项( [{"id:...}, {"id":...}], [...] )

for d in v -这将从这些列表中获取所有词典( {"id:...}, {"id":...}, .... )

d["id"] -这将从密钥中获取值 "id"