Trying to parse only 3 key values from json file

[cubangt]

What am i doing wrong?

import json
from datetime import datetime
import pandas as pd


f = open('message_1.json')

data = json.load(f)

for message in data["messages"]:
    timestamp = datetime.fromtimestamp(message["timestamp_ms"] / 1000)
    
    if 'content' not in message:
        rw = pd.DataFrame([timestamp,message["sender_name"],pd.NA], columns=['Date', 'Name', 'Comment'])

    else:
        rw = pd.DataFrame([timestamp,message["sender_name"], message["content"]], columns=['Date', 'Name', 'Comment'])


rw.to_csv('igMess.csv',columns=["Date", "Name", "Comment"], header=None, index=None, mode='a')

f.close()

I get this error:

Error:
ValueError: Shape of passed values is (3, 1), indices imply (3, 3)