用Python 写一个定时发送邮件的代码

好的，以下是用 Python 写一个定时发送邮件的代码的示例：

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

# 发件人邮箱地址
sender = 'your_email@example.com'

# 接收人邮箱地址
receiver = 'recipient_email@example.com'

# 发件人邮箱的SMTP服务器地址，根据邮件服务商不同可能会有所调整
smtp_server = 'smtp.example.com'

# 发件人邮箱的SMTP服务器端口
smtp_port = 587

# 发件人邮箱账号和密码
username = 'your_username'
password = 'your_password'

# 邮件正文
text = 'email text content'

# 创建带附件的邮件实例
msg = MIMEMultipart()

# 设置邮件标题、发件人、收件人、时间等信息
msg['Subject'] = 'email subject'
msg['From'] = sender
msg['To'] = receiver
msg['Date'] = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')

# 添加邮件正文
msg.attach(MIMEText(text))

# 添加附件
filename = 'attachment.txt'
with open(filename, 'rb') as f:
    attachment = MIMEApplication(f.read(), Name=filename)
    attachment['Content-Disposition'] = 'attachment; filename="%s"' % filename
    msg.attach(attachment)

# 连接SMTP服务器，登录发件人邮箱账号
smtp = smtplib.SMTP(smtp_server, smtp_port)
smtp.starttls()
smtp.login(username, password)

# 定时发送邮件
while True:
    now = datetime.datetime.now()
    if now.hour == 8 and now.minute == 0:
        smtp.sendmail(sender, receiver, msg.as_string())
        print('Email sent at %s' % now)
        break
    else:
        print('Current time is %s, waiting for 1 minute' % now)
        time.sleep(60)

# 关闭SMTP连接
smtp.quit()

这段代码可以每天 8 点定时发送一封带附件的邮件。你可以根据自己的需求修改发送时间、收件人、邮件正文、附件等内容。