如何用iterables将dict“扩展”为Python中的dict列表

Question

例如，我有一个

{
    "key1":[1,2,3],
    "key2":[1,2]
}

我想把它变成

[{"key1":1, "key2":1},{"key1":1, "key2":2},{"key1":2, "key2":1}...]

我通过使用eval来实现这一点，我认为递归也有帮助。但是有更好的解决办法吗？你知道吗

Answer 1

d = {
    "key1":[1,2,3],
    "key2":[1,2]
}
from itertools import product
[{'key1':i,'key2':j}  for i,j in product(d['key1'],d['key2'])]


[{'key1': 1, 'key2': 1}, {'key1': 1, 'key2': 2}, {'key1': 2, 'key2': 1}, {'key1': 2, 'key2': 2}, {'key1': 3, 'key2': 1}, {'key1': 3, 'key2': 2}]