在使用csv.writer时，如何删除csv文件中每个单元格中的括号？

import csv
import re

with open('example.csv', 'r') as file:
    reader = csv.reader(file)
    data = [row for row in reader]

with open('output.csv', 'w', newline='') as file:
    writer = csv.writer(file)

for row in data:
    cleaned_row = [re.sub(r'\(|\)', '', cell) for cell in row]
    writer.writerow(cleaned_row)

file.close()