python爬虫怎么存csv

import csv

with open('data.csv', 'w', newline='') as csvfile:    csvwriter = csv.writer(csvfile)

csvwriter.writerow(['列1', '列2', '列3'])  # 写入标题行for row in data:    csvwriter.writerow(row)  # 循环遍历数据行并将其写入

csvfile.close()

import requestsfrom bs4 import BeautifulSoupimport csv# 爬取网页url = 'https://example.com/data.html'response = requests.get(url)# 解析HTMLsoup = BeautifulSoup(response.text, 'html.parser')# 提取数据data = []for row in soup.find_all('tr'):    row_data = [column.text for column in row.find_all('td')]    data.append(row_data)# 打开CSV文件并写入数据with open('data.csv', 'w', newline='') as csvfile:    csvwriter = csv.writer(csvfile)    csvwriter.writerow(['姓名', '年龄', '城市'])    for row in data:        csvwriter.writerow(row)