Question

我正在尝试从字典中删除列表中某些JSON部分的{'settings'：'Val'}，我可以使用var ['a'] ['b'] [2]进行删除但是我想通过遍历“ b”来删除“设置”

删除“设置”的方法是什么？

var = {
    'a': {
        'b': [
            {
                'check': 'val'
            },
            {
                'alerts': 'val'
            },
            {
                'settings': 'val'
            }
        ]
    }
}

for items in var['a']['b']:
    del items['settings']

Traceback (most recent call last):
  File "/Users/sree/PycharmProjects/test/app1.py", line 59, in <module>
    del items['settings']
KeyError: 'settings

## tried this and getting the same error

for items in var['a']['b']:
    items.pop('settings')
    print(var)

Traceback (most recent call last):
  File "/Users/sree/PycharmProjects/test/app1.py", line 70, in <module>
    items.pop('settings')
KeyError: 'settings'

Answer 1

您可以使用列表理解来过滤字典：

var = {
    'a': {
        'b': [
            {
                'check': 'val'
            },
            {
                'alerts': 'val'
            },
            {
                'settings': 'val'
            }
        ]
    }
}


var['a']['b'] = [val for val in var['a']['b'] if 'settings' not in val]

import json
print(json.dumps(var, indent=4))

打印：

{
    "a": {
        "b": [
            {
                "check": "val"
            },
            {
                "alerts": "val"
            }
        ]
    }
}

使用python3删除列表中的JSON字符串

1 个答案: