根据python中嵌套字典中的键值从列表中删除字典

时间：2021-02-12 13:02:43

标签： python list dictionary filter

我有以下字典列表：

item = {
    "relationship": [
        {
            "name": "",
            "id": "",
            "type": "",
            "relationship": {
                "id": "3006:33",
                "fkey_logical_column_id": "2006:41",
                "pkey_logical_column_id": "2006:51",
                "fkey_column_id": "3003:9",
                "fkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"ORDER_ITEMS\".\"ORDER_ID\"",
                "pkey_column_id": "3003:17",
                "pkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"ORDERS\".\"ORDER_ID\"",
                "fkey_table_id": "3001:7",
                "pkey_table_id": "3001:14",
                "pkey_physical_table_name": "",
                "pkey_business_table_name": "",
                "type": "",
                "fkey_business_column_name": "\"ofline_online_test\".\"ORDER_ITEMS\".\"ORDER_ID\"",
                "pkey_business_column_name": "\"ofline_online_test\".\"ORDERS\".\"ORDER_ID\"",
                "from_type": "0..1",
                "to_type": "n..n"
            }
        },
        {
            "name": "",
            "id": "",
            "type": "",
            "relationship": {
                "id": "3006:34",
                "fkey_logical_column_id": "2006:42",
                "pkey_logical_column_id": "2006:70",
                "fkey_column_id": "3003:10",
                "fkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"ORDER_ITEMS\".\"PRODUCT_ID\"",
                "pkey_column_id": "3003:29",
                "pkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"PRODUCTS\".\"PRODUCT_ID\"",
                "fkey_table_id": "3001:7",
                "pkey_table_id": "3001:25",
                "pkey_physical_table_name": "",
                "pkey_business_table_name": "",
                "type": "",
                "fkey_business_column_name": "\"ofline_online_test\".\"ORDER_ITEMS\".\"PRODUCT_ID\"",
                "pkey_business_column_name": "\"ofline_online_test\".\"PRODUCTS\".\"PRODUCT_ID\"",
                "from_type": "0..1",
                "to_type": "n..n"
            }
        },
        {
            "name": "",
            "id": "",
            "type": "",
            "relationship": {
                "id": "3006:35",
                "fkey_logical_column_id": "2006:67",
                "pkey_logical_column_id": "2006:61",
                "fkey_column_id": "3003:26",
                "fkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"PRODUCTS\".\"CATEGORY_ID\"",
                "pkey_column_id": "3003:22",
                "pkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"PRODUCT_CATEGORIES\".\"CATEGORY_ID\"",
                "fkey_table_id": "3001:25",
                "pkey_table_id": "3001:21",
                "pkey_physical_table_name": "",
                "pkey_business_table_name": "",
                "type": "",
                "fkey_business_column_name": "\"ofline_online_test\".\"PRODUCTS\".\"CATEGORY_ID\"",
                "pkey_business_column_name": "\"ofline_online_test\".\"PRODUCT_CATEGORIES\".\"CATEGORY_ID\"",
                "from_type": "0..1",
                "to_type": "n..n"
            }
        }
    ]
}

我有一个搜索 ID **pkey_table_id = 3001:14 **，它出现在列表项["relationship"][0]["relationship"]["pkey_table_id"]的第一项中。 我想用 key item["relationship"] 遍历列表，如果找到匹配 **pkey_table_id = 3001:14 ** 我想从列表中删除该特定项目。所以我的结果是 需要的输出

item = {
    "relationship": [
        {
            "name": "",
            "id": "",
            "type": "",
            "relationship": {
                "id": "3006:34",
                "fkey_logical_column_id": "2006:42",
                "pkey_logical_column_id": "2006:70",
                "fkey_column_id": "3003:10",
                "fkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"ORDER_ITEMS\".\"PRODUCT_ID\"",
                "pkey_column_id": "3003:29",
                "pkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"PRODUCTS\".\"PRODUCT_ID\"",
                "fkey_table_id": "3001:7",
                "pkey_table_id": "3001:25",
                "pkey_physical_table_name": "",
                "pkey_business_table_name": "",
                "type": "",
                "fkey_business_column_name": "\"ofline_online_test\".\"ORDER_ITEMS\".\"PRODUCT_ID\"",
                "pkey_business_column_name": "\"ofline_online_test\".\"PRODUCTS\".\"PRODUCT_ID\"",
                "from_type": "0..1",
                "to_type": "n..n"
            }
        },
        {
            "name": "",
            "id": "",
            "type": "",
            "relationship": {
                "id": "3006:35",
                "fkey_logical_column_id": "2006:67",
                "pkey_logical_column_id": "2006:61",
                "fkey_column_id": "3003:26",
                "fkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"PRODUCTS\".\"CATEGORY_ID\"",
                "pkey_column_id": "3003:22",
                "pkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"PRODUCT_CATEGORIES\".\"CATEGORY_ID\"",
                "fkey_table_id": "3001:25",
                "pkey_table_id": "3001:21",
                "pkey_physical_table_name": "",
                "pkey_business_table_name": "",
                "type": "",
                "fkey_business_column_name": "\"ofline_online_test\".\"PRODUCTS\".\"CATEGORY_ID\"",
                "pkey_business_column_name": "\"ofline_online_test\".\"PRODUCT_CATEGORIES\".\"CATEGORY_ID\"",
                "from_type": "0..1",
                "to_type": "n..n"
            }
        }
    ]
}

这是我尝试过的：

id_input = 3001:14
item ['relationship'] = list(filter(lambda i: i['pkey_table_id'] != id_input , item['relationship']['relationship']))

4 个答案:

答案 0 :(得分：2)

以下应该有效：

id_input = '3001:14'
item["relationship"] = [
    i for i in item["relationship"] if i["relationship"]["pkey_table_id"] != id_input
]

答案 1 :(得分：1)

你几乎是对的，稍微更正了你的代码：

Try it online!

def process(item):
    id_input = '3001:14'
    item['relationship'] = list(filter(lambda i:
        i['relationship']['pkey_table_id'] != id_input , item['relationship']))

item = {
    "relationship": [
        {
            "name": "",
            "id": "",
            "type": "",
            "relationship": {
                "id": "3006:33",
                "fkey_logical_column_id": "2006:41",
                "pkey_logical_column_id": "2006:51",
                "fkey_column_id": "3003:9",
                "fkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"ORDER_ITEMS\".\"ORDER_ID\"",
                "pkey_column_id": "3003:17",
                "pkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"ORDERS\".\"ORDER_ID\"",
                "fkey_table_id": "3001:7",
                "pkey_table_id": "3001:14",
                "pkey_physical_table_name": "",
                "pkey_business_table_name": "",
                "type": "",
                "fkey_business_column_name": "\"ofline_online_test\".\"ORDER_ITEMS\".\"ORDER_ID\"",
                "pkey_business_column_name": "\"ofline_online_test\".\"ORDERS\".\"ORDER_ID\"",
                "from_type": "0..1",
                "to_type": "n..n"
            }
        },
        {
            "name": "",
            "id": "",
            "type": "",
            "relationship": {
                "id": "3006:34",
                "fkey_logical_column_id": "2006:42",
                "pkey_logical_column_id": "2006:70",
                "fkey_column_id": "3003:10",
                "fkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"ORDER_ITEMS\".\"PRODUCT_ID\"",
                "pkey_column_id": "3003:29",
                "pkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"PRODUCTS\".\"PRODUCT_ID\"",
                "fkey_table_id": "3001:7",
                "pkey_table_id": "3001:25",
                "pkey_physical_table_name": "",
                "pkey_business_table_name": "",
                "type": "",
                "fkey_business_column_name": "\"ofline_online_test\".\"ORDER_ITEMS\".\"PRODUCT_ID\"",
                "pkey_business_column_name": "\"ofline_online_test\".\"PRODUCTS\".\"PRODUCT_ID\"",
                "from_type": "0..1",
                "to_type": "n..n"
            }
        },
        {
            "name": "",
            "id": "",
            "type": "",
            "relationship": {
                "id": "3006:35",
                "fkey_logical_column_id": "2006:67",
                "pkey_logical_column_id": "2006:61",
                "fkey_column_id": "3003:26",
                "fkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"PRODUCTS\".\"CATEGORY_ID\"",
                "pkey_column_id": "3003:22",
                "pkey_column_name": "\"localhost:1521/orcl\"..\"OT\".\"PRODUCT_CATEGORIES\".\"CATEGORY_ID\"",
                "fkey_table_id": "3001:25",
                "pkey_table_id": "3001:21",
                "pkey_physical_table_name": "",
                "pkey_business_table_name": "",
                "type": "",
                "fkey_business_column_name": "\"ofline_online_test\".\"PRODUCTS\".\"CATEGORY_ID\"",
                "pkey_business_column_name": "\"ofline_online_test\".\"PRODUCT_CATEGORIES\".\"CATEGORY_ID\"",
                "from_type": "0..1",
                "to_type": "n..n"
            }
        }
    ]
}

process(item)
print(item)

输出：

{
    "relationship": [
        {
            "name": "",
            "id": "",
            "type": "",
            "relationship": {
                "id": "3006:34",
                "fkey_logical_column_id": "2006:42",
                "pkey_logical_column_id": "2006:70",
                "fkey_column_id": "3003:10",
                "fkey_column_name": '"localhost:1521/orcl".."OT"."ORDER_ITEMS"."PRODUCT_ID"',
                "pkey_column_id": "3003:29",
                "pkey_column_name": '"localhost:1521/orcl".."OT"."PRODUCTS"."PRODUCT_ID"',
                "fkey_table_id": "3001:7",
                "pkey_table_id": "3001:25",
                "pkey_physical_table_name": "",
                "pkey_business_table_name": "",
                "type": "",
                "fkey_business_column_name": '"ofline_online_test"."ORDER_ITEMS"."PRODUCT_ID"',
                "pkey_business_column_name": '"ofline_online_test"."PRODUCTS"."PRODUCT_ID"',
                "from_type": "0..1",
                "to_type": "n..n",
            },
        },
        {
            "name": "",
            "id": "",
            "type": "",
            "relationship": {
                "id": "3006:35",
                "fkey_logical_column_id": "2006:67",
                "pkey_logical_column_id": "2006:61",
                "fkey_column_id": "3003:26",
                "fkey_column_name": '"localhost:1521/orcl".."OT"."PRODUCTS"."CATEGORY_ID"',
                "pkey_column_id": "3003:22",
                "pkey_column_name": '"localhost:1521/orcl".."OT"."PRODUCT_CATEGORIES"."CATEGORY_ID"',
                "fkey_table_id": "3001:25",
                "pkey_table_id": "3001:21",
                "pkey_physical_table_name": "",
                "pkey_business_table_name": "",
                "type": "",
                "fkey_business_column_name": '"ofline_online_test"."PRODUCTS"."CATEGORY_ID"',
                "pkey_business_column_name": '"ofline_online_test"."PRODUCT_CATEGORIES"."CATEGORY_ID"',
                "from_type": "0..1",
                "to_type": "n..n",
            },
        },
    ]
}

答案 2 :(得分：0)

这是对您自己的代码稍加修改后的答案：

id_input = "3001:14"
item['relationship'] = list(filter(lambda i: i['relationship']['pkey_table_id'] != id_input, item['relationship']))
  1. 确保 id_input 是有效字符串！
  2. 您必须将 item['relationship'] 传递给过滤器函数。

答案 3 :(得分：0)

这应该有效

val_to_remove = '3001:25'
for i in item['relationship']:
    if i['relationship']['pkey_table_id'] == val_to_remove :         
        item['relationship'].remove(i)
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