Delete nested in nested JSON file-CodePudding

First i know how to read .JSON file, but now i confused how to delete partial nested. As you can see i use clear() method to clear nested JSON, why? When i want to use remove(i), it works, but not removing what i want, just make the JSON file got an error Before

{"dump data": [
    {
        "dump detail": [
            {
                "dumper": "MorpKnight",
                "title": "test"
            }
        ]
    },
    {
        "dump detail": [
            {
                "dumper": "MorpKnight",
                "title": "test 2"
            }
        ]
    }
]
}

After (The one i want as result)

{"dump data": [
    {
        "dump detail": [
            {
                "dumper": "MorpKnight",
                "title": "test"
            }
        ]
    }

And this is my code

data_name = input("Search data")
with open('config.json', "r ") as file:
        json_load = json.load(file)
        for i in json_load['dump data']:
            for j in i['dump detail']:
                if j['title'] == data_name:
                    i.clear()
                    print("Deleted")
                    return

CodePudding user response：

You cannot remove items from a list while iterating over it, it's a bad idea unless you do it in reverse and it's not efficient nonetheless.

This however should work:

import json
data_name = input("Search data")
with open('config.json', "r ") as file:
    json_load = json.load(file)
    new_details = []
    for detail in json_load['dump data']:
        if all(data['title'] != data_name for data in detail['dump detail']):
            new_details.append(detail)
    json_load['dump data'] = new_details

I recreate the details list per your specification. You may then save json_load back into the file if you wish.

CodePudding user response：

data = {"dump data": [
    {
        "dump detail": [
            {
                "dumper": "MorpKnight",
                "title": "test"
            }
        ]
    },
    {
        "dump detail": [
            {
                "dumper": "MorpKnight",
                "title": "test 2"
            }
        ]
    }
]
}

def clean(data, data_name):
    data_clean = {'dump data': []}
    for i, e in enumerate(data['dump data']):
        if e['dump detail'][0]['title'] != data_name:
            data_clean['dump data'] = e
    return data_clean
data_name = input("Search data: ")
data_clean = clean(data, data_name)
print(data_clean)

prints

Search data: test 2
{'dump data': [{'dump detail': [{'dumper': 'MorpKnight', 'title': 'test'}]}]}