Question 110016 in Json Question posted in
Our archive of expertly curated questions and answers provides insights and solutions to common problems related to this popular data interchange format. From parsing and manipulating JSON data to integrating it with various programming languages and web services, our archive has got you covered. Start exploring today and take your JSON skills to the next level

Remove JSON list string items based on a list of strings

Following is my sample json file:

    {
        "test": [{
            "Location": "Singapore",
            "Values": [{
                    "Name": "00",
                    "subvalues": [
                        "5782115e1",
                        "688ddd16e",
                        "3e91dc966",
                        "5add96256",
                        "10352cf0f",
                        "17f233d31",
                        "130c09135",
                        "2f49eb2a6",
                        "2ae1ad9e0",
                        "23fd76115"
                    ]
                },
                {
                    "Name": "01",
                    "subvalues": [
                        "b43678dfe",
                        "202c7f508",
                        "73afcaf7c"
                    ]
                }
            ]
        }]
    }

I’m trying to remove from json file using the following list: ["130c09135", "2f49eb2a6", "5782115e1", "b43678dfe"]

end result:

 {
    "test": [{
        "Location": "Singapore",
        "Values": [{
                "Name": "00",
                "subvalues": [
                    "688ddd16e",
                    "3e91dc966",
                    "5add96256",
                    "10352cf0f",
                    "17f233d31",
                    "2ae1ad9e0",
                    "23fd76115"
                ]
            },
            {
                "Name": "01",
                "subvalues": [
                    "202c7f508",
                    "73afcaf7c"
                ]
            }
        ]
    }]
 }

I know that using replace in text it would break the structure, new to json, any help would be appreciated.

Tags:

2

Answers


  1. 0

    You can use following code snippet:

    import json

toRemoveList = ["130c09135", "2f49eb2a6", "5782115e1", "b43678dfe"]

with open('data.json', 'r') as file:
    jsonData = json.loads(file.read())

for valueIndex in range(0, len(jsonData["test"][0]["Values"])):
    value = jsonData["test"][0]["Values"][valueIndex]

    filtered = [x for x in value["Subvalues"] if x not in toRemoveList]

    jsonData["test"][0]["Values"][valueIndex]["Subvalues"] = filtered

with open('newData.json', 'w') as file:
    json.dump(jsonData, file, indent=4)

    Note: You must use ‘Subvalues’ with same writing in every instance. You can’t use ‘Subvalues’ and ‘subvalues’ in different instances…

    Login or Signup to reply.
  2. 0

    Here is a generalised approach that does not rely on names of keys or depth. The only assumption is that if the dictionary contains any list comprised entirely of strings, it will be reconstructed excluding certain values – i.e., the EXCLUSIONS set

    from json import load as LOAD, dumps as DUMPS

FILENAME = '/Volumes/G-Drive/foo.json'
EXCLUSIONS = {"130c09135", "2f49eb2a6", "5782115e1", "b43678dfe"}

def process(d):
    if isinstance(d, dict):
        for v in d.values():
            process(v)
    elif isinstance(d, list):
        if all(isinstance(v, str) for v in d):
            d[:] = [v for v in d if v not in EXCLUSIONS]
        else:
            for v in d:
                process(v)
    return d


with open(FILENAME) as data:
    print(DUMPS(process(LOAD(data)), indent=2))

    Output:

    {
  "test": [
    {
      "Location": "Singapore",
      "Values": [
        {
          "Name": "00",
          "Subvalues": [
            "688ddd16e",
            "3e91dc966",
            "5add96256",
            "10352cf0f",
            "17f233d31",
            "2ae1ad9e0",
            "23fd76115"
          ]
        },
        {
          "Name": "01",
          "subvalues": [
            "202c7f508",
            "73afcaf7c"
          ]
        }
      ]
    }
  ]
}
    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search