Convert nested JSON to CSV in Python

Question

I am trying to convert JSON data into a CSV in Python and found this code listed on Stack Exchange from a while back (link:How can I convert JSON to CSV?)

It no longer works in Python 3, giving me different errors. Anyone know how to fix for Python 3? Thanks.

import csv
import json

x = """[
    {
        "pk": 22,
        "model": "auth.permission",
        "fields": {
            "codename": "add_logentry",
            "name": "Can add log entry",
            "content_type": 8
        }
    },
    {
        "pk": 23,
        "model": "auth.permission",
        "fields": {
            "codename": "change_logentry",
            "name": "Can change log entry",
            "content_type": 8
        }
    },
    {
        "pk": 24,
        "model": "auth.permission",
        "fields": {
            "codename": "delete_logentry",
            "name": "Can delete log entry",
            "content_type": 8
    }
    }
]"""

x = json.loads(x)

f = csv.writer(open("test.csv", "wb+"))

# Write CSV Header, If you dont need that, remove this line
f.writerow(["pk", "model", "codename", "name", "content_type"])

for x in x:
    f.writerow([x["pk"],
                x["model"],
                x["fields"]["codename"],
                x["fields"]["name"],
                x["fields"]["content_type"]])

score 2 · Accepted Answer · answered Nov 25 '17 at 00:01

2

You were opening the file as binary with wb+ whereas you are trying to write str.

f = csv.writer(open("test.csv", "w+"))

answered Nov 25 '17 at 00:01

user1767754

23,311
18
141
164

score 0 · Answer 2 · edited Oct 24 '18 at 12:20

Maybe this code will help you in some way to understand that.

import json,csv    

data = []

with open('your_json_file_here.json') as file:
    for line in file:
        data.append(json.loads(line)) length = len(data)

with open('create_new_file.csv','w') as f:
    writer = csv.writer(f)
    writers = csv.DictWriter(f, fieldnames=['header1','header2'])
    writers.writeheader()
    for iter in range(length):

        writer.writerow((data[iter]['specific_col_name1'],data[iter]['specific_col_name2'])) f.close()

Convert nested JSON to CSV in Python

2 Answers2