我正在尝试找到一种用Python邮寄文件内容的方法

import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.base import MIMEBase
from email import encoders

def send_email(sender, receiver, subject, body, attachment_path):
    # 邮件配置
    smtp_server = 'smtp.example.com'
    smtp_port = 587
    smtp_username = 'your_username'
    smtp_password = 'your_password'

    # 创建邮件对象
    msg = MIMEMultipart()
    msg['From'] = sender
    msg['To'] = receiver
    msg['Subject'] = subject

    # 添加邮件正文
    msg.attach(MIMEText(body, 'plain'))

    # 添加附件
    attachment = open(attachment_path, 'rb')
    part = MIMEBase('application', 'octet-stream')
    part.set_payload(attachment.read())
    encoders.encode_base64(part)
    part.add_header('Content-Disposition', f'attachment; filename="{attachment_path}"')
    msg.attach(part)

    # 连接到SMTP服务器并发送邮件
    with smtplib.SMTP(smtp_server, smtp_port) as server:
        server.starttls()
        server.login(smtp_username, smtp_password)
        server.send_message(msg)

# 使用示例
sender = 'sender@example.com'
receiver = 'receiver@example.com'
subject = '文件内容'
body = '这是一封包含文件内容的邮件。'
attachment_path = 'path/to/file.txt'

send_email(sender, receiver, subject, body, attachment_path)