a = [{"id": 1, "data": 1}, {"id": 2, "data": 1}, {"id": 3, "data": 1}, {"id": 4, "data": 1}]
b = [{"id": 1, "key": 1}, {"id": 2, "key": 2}, {"id": 3, "key": 3}, {"id": 4, "key": 4}]
count = 0
for i in a:
for j in b:
count += 1
if i["id"] == j["id"]:
i["key"] = j["key"]
下面可以实现
