Python 如何仅检查特定dict键的唯一值？

我正在尝试具有相同的行为，但我想检查

url

dict是否包含唯一的值，而不是检查完整的dict

def unique(data):
    result = {}
    for key, value in data.items():
        new_list = []
        for item in value:
            if item not in new_list:
                new_list.append(item)
        result[key] = new_list
        return result



games = { 
   "games":[ 
      { 
         "city":"Santa Monica, CA",
         "company":"rockstar",
         "date":{ 
            "display":"24 days ago",
            "timestamp":1570721082
         },
         "game":"akakkak",
         "challenge":"leel",
         "url":"https://www.game.com/12757a575/aaashs/2222"
      },{ 
         "city":"Santa Monica, CA",
         "company":"rockstar",
         "date":{ 
            "display":"24 days ago",
            "timestamp":1570721082
         },
         "game":"akak2kak",
         "challenge":"leel",
         "url":"https://www.game.com/12757a575/aaashs/2222"
      }
   ]
}

print(unique(games))

---

我期望

“url”的输出：https://www.game.com/12757a575/aaashs/2222“

在同一个键中没有相同的值

如何创建一个单独的url列表来跟踪每个唯一的url，如下所示：

def unique(data):
    result = {}
    for key, value in data.items():
        new_list = []
        url_list = []
        for item in value:
            if item['url'] not in url_list:
                new_list.append(item)
                url_list.append(item['url'])
        result[key] = new_list
        return result

---

请看这里的答案：我认为检查dict的所有内容将保持相同的行为，但我只想检查url键值