complex json file to csv in python

I need to convert a complex json file to csv using python, I tried a lot of codes without success, I came here for help,I updated the question, the JSON file is about a million,I need to convert them to csv format

csv file

{
    "_id": {
        "$oid": "2e3230"
    },
    "add": {
        "address1": {
            "address": "kvartira 14",
            "zipcode": "10005",
        },
        "name": "Evgiya Kovava",
        "address2": {
            "country": "US",
            "country_name": "NY",
        }
    }
}
{
    "_id": {
        "$oid": "2d118c8bo"
    },
    "add": {
        "address1": {
            "address": "kvartira 14",
            "zipcode": "52805",
        },
        "name": "Eiya tceva",
        "address2": {
            "country": "US",
            "country_name": "TX",
        }
    }
}