如何使用Python以html格式发送测试用例结果

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

sender = 'your_email@example.com'
receiver = 'recipient_email@example.com'

msg = MIMEMultipart('alternative')
msg['Subject'] = '测试用例结果'
msg['From'] = sender
msg['To'] = receiver

with open('test_results.html', 'r') as file:
    test_results = file.read()

html = MIMEText(test_results, 'html')
msg.attach(html)

smtp_server = 'smtp.example.com'
smtp_port = 587
smtp_username = 'your_email@example.com'
smtp_password = 'your_password'

try:
    server = smtplib.SMTP(smtp_server, smtp_port)
    server.starttls()
    server.login(smtp_username, smtp_password)
    server.sendmail(sender, receiver, msg.as_string())
    server.quit()
    print('邮件发送成功！')
except Exception as e:
    print('邮件发送失败:', str(e))