如何在Python 3中更改csv中的日期格式

import csv
from datetime import datetime

with open('data.csv', 'r') as file:
    reader = csv.reader(file)
    data = list(reader)

for row in data:
    date_str = row[0]  # 假设日期在第一列
    date_obj = datetime.strptime(date_str, '%Y-%m-%d')  # 解析日期字符串为日期对象
    new_date_str = date_obj.strftime('%d/%m/%Y')  # 将日期对象格式化为新的日期字符串
    row[0] = new_date_str  # 更新原始数据行中的日期列

with open('data_new.csv', 'w', newline='') as file:
    writer = csv.writer(file)
    writer.writerows(data)