用 python 发送以txt文件为内容的电子邮件

可以使用Python的smtplib和email模块来发送以txt文件为内容的电子邮件。以下是一个基本的示例代码：

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

# 发件人、收件人、主题、正文
sender = 'your_email@example.com'
receiver = 'recipient@example.com'
subject = 'Email with Attachment'
body = 'Please find the attached txt file.'

# 创建邮件
msg = MIMEMultipart()
msg['From'] = sender
msg['To'] = receiver
msg['Subject'] = subject
msg.attach(MIMEText(body, 'plain'))

# 添加附件
with open('example.txt', 'rb') as f:
    attachment = MIMEApplication(f.read(), _subtype='txt')
    attachment.add_header('content-disposition', 'attachment', filename='example.txt')
    msg.attach(attachment)

# 发送邮件
with smtplib.SMTP('smtp.gmail.com', 587) as smtp:
    smtp.starttls()
    smtp.login(sender, 'your_password')
    smtp.send_message(msg)

需要将`your_email@example.com`替换为发件人的电子邮件地址，`recipient@example.com`替换为收件人的电子邮件地址，`example.txt`替换为要发送的txt文件的文件名，`smtp.gmail.com`替换为对应的SMTP服务器地址，`your_password`替换为发件人的电子邮件密码。