Python json&csv file

import json

data1 = {
    'no' : 1,
    'name' : 'Nobel',
}
json_str = json.dumps(data1)
data2 = json.loads(json_str)

with open('data.json', 'w', encoding='utf-8') as f:
    json.dump(data1, f)
with open('data.json', 'r', encoding='utf-8') as f:
    data = json.load(f)

import csv

rows = [{'gid': '111', 'title': '222'}]
fieldnames = ['gid', 'title']
with open('example.csv', 'w', newline='', encoding='utf-8') as file:
    writer = csv.DictWriter(file, fieldnames=fieldnames)
    writer.writeheader()
    writer.writerow({'gid': '000', 'title': '111'})
    writer.writerows(rows)

# with Header
with open('example.csv', mode='r', encoding='utf-8') as f:
    reader = csv.DictReader(f)
    headers = reader.fieldnames
    for row in reader:
        print(row)

# no Header
with open('example.csv', mode='r', encoding='utf-8') as f:
    my_fields = ['gid', 'title']
    reader = csv.DictReader(f, fieldnames=my_fields)
    for row in reader:
        print(row)