python - 如果键包含字符串，则删除整个 json 对象

Question

如果对象的键包含字符串，我该如何删除整个对象？

在这个例子中，程序应该删除整个 player1 和 player2，因为我想删除 key rarity 中带有字符串“rare”的所有玩家。

{
  "player": {
    "rating": "99",
    "rarity": "super_rare"
  },
  "player2": {
    "rating": "87",
    "rarity": "rare"
  },
  "player3": {
    "rating": "89",
    "rarity": "common"
  }
}

Answer 1

你可以使用字典理解来做到这一点:

data = {
    "player": {
        "rating": "99",
        "rarity": "super_rare"
    },
    "player2": {
        "rating": "87",
        "rarity": "rare"
    },
    "player3": {
        "rating": "89",
        "rarity": "common"
    }
}

filtered_data = {k: v for k, v in data.items() if "rare" not in v["rarity"]}
print(filtered_data) # {'player3': {'rating': '89', 'rarity': 'common'}}

编辑:

如果你想从文件读取/写入数据，尝试:

import json

file_name = "full/path/to/file"

# read the data
with open(file_name, "r") as fr:
    data = json.load(fr)

# manipulate the data
filtered_data = {k: v for k, v in data.items() if "rare" not in v["rarity"]}

# write the data back to file
with open(file_name, "w") as fw:
    json.dump(filtered_data, fw)