Filling in missing values

[radioactive9]

Hello

Not sure about how your json file looks but why not keep things simple and find the Value which is none. I am not sure what exactly you want to achieve but the below may help

import json

data = []
keys = ["field1","field2","field3","field4", "field5", "field6" ]

with open('test_json.json') as json_data:
    for line in json_data:
        dataline = json.loads(line)
        row = []
        for key in keys:
            row.append(dataline.get(key))
        data.append(row)