如何为单个收件人创建多封电子邮件，并在每个邮件上附加不同的文件？

import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.application import MIMEApplication

# 设置邮件服务器的相关信息
smtp_server = 'smtp.example.com'
smtp_port = 587
sender_email = 'sender@example.com'
sender_password = 'password'

# 创建邮件对象
msg = MIMEMultipart()
msg['From'] = sender_email
msg['To'] = 'recipient@example.com'
msg['Subject'] = 'Multiple Emails with Different Attachments'

# 添加邮件正文
body = 'This is the body of the email.'
msg.attach(MIMEText(body, 'plain'))

# 添加第一个附件
attachment1 = MIMEApplication(open('file1.txt', 'rb').read())
attachment1.add_header('Content-Disposition', 'attachment', filename='file1.txt')
msg.attach(attachment1)

# 添加第二个附件
attachment2 = MIMEApplication(open('file2.txt', 'rb').read())
attachment2.add_header('Content-Disposition', 'attachment', filename='file2.txt')
msg.attach(attachment2)

# 发送邮件
with smtplib.SMTP(smtp_server, smtp_port) as server:
    server.starttls()
    server.login(sender_email, sender_password)
    server.send_message(msg)