将Python字典中的JSON值累积为数组

{ 
"links": [
{"source":"0","target":"1","weight":1,"color":"white"},
{"source":"0","target":"2","weight":1,"color":"yellow"},
{"source":"0","target":"3","weight":1,"color":"white"},
]
}

我想收集所有 target 为一个人 source 这样地:

{"source": 0, "neighbors": ["1","2","3"]} 哪里 neighbors 都收齐了吗

这是我的密码

import json

with open("linksGr.json") as file:
    data = json.load(file)

collectDict = {}
for obj in data["links"]:
    if (collectDict["source"] == obj["source"]):
        collectDict["neighbour"] = obj["target"]

我只需要一种方法来累积每个源的所有目标,而不是像我在这里所做的那样有多个源

collectDict["source"] = obj["source"]
collectDict["neighbour"] = obj["target"]

任何帮助都将不胜感激。我确信这里缺少一些基本的概念和简单的方法。谢谢你的帮助。