从嵌套字典中删除值的正确方法

def delete_value_from_nested_dict(data, value):
    if isinstance(data, dict):
        for key, val in list(data.items()):
            if val == value:
                del data[key]
            else:
                delete_value_from_nested_dict(val, value)
    elif isinstance(data, list):
        for item in data:
            delete_value_from_nested_dict(item, value)

# 示例用法
nested_dict = {
    'key1': 'value1',
    'key2': {
        'key3': 'value2',
        'key4': {
            'key5': 'value3',
            'key6': 'value4'
        }
    },
    'key7': [
        {'key8': 'value5'},
        {'key9': 'value6'}
    ]
}

delete_value_from_nested_dict(nested_dict, 'value4')
print(nested_dict)

{
    'key1': 'value1',
    'key2': {
        'key3': 'value2',
        'key4': {
            'key5': 'value3'
        }
    },
    'key7': [
        {'key8': 'value5'},
        {'key9': 'value6'}
    ]
}