如何在Django的FileField中保存收到的电子邮件中的附件？

import poplib
import email
import os
from django.core.files.base import ContentFile
from myapp.models import MyModel

def save_email_attachments():
    # 连接到邮件服务器
    mail_server = poplib.POP3('pop.example.com')
    mail_server.user('username')
    mail_server.pass_('password')

    # 获取邮件列表
    num_messages = len(mail_server.list()[1])

    # 遍历每封邮件
    for i in range(num_messages):
        # 获取邮件内容
        response, message_lines, octets = mail_server.retr(i+1)
        message_content = b'\r\n'.join(message_lines).decode('utf-8')
        mail_server.dele(i+1)  # 标记该邮件为已删除

        # 解析邮件内容
        msg = email.message_from_string(message_content)

        # 遍历附件
        for part in msg.walk():
            if part.get_content_maintype() == 'multipart':  # 跳过非附件部分
                continue
            if part.get('Content-Disposition') is None:  # 跳过非附件部分
                continue

            # 获取附件文件名和内容
            filename = part.get_filename()
            file_content = part.get_payload(decode=True)

            # 保存附件文件
            file_path = os.path.join('/path/to/save/attachments', filename)
            with open(file_path, 'wb') as f:
                f.write(file_content)

            # 将附件文件路径保存到Django模型的FileField字段中
            my_model = MyModel()
            my_model.attachment.save(filename, ContentFile(file_content))
            my_model.save()

    # 关闭邮件服务器连接
    mail_server.quit()