1# Copyright (C) 2002-2006 Python Software Foundation
2# Author: Barry Warsaw
3# Contact: email-sig@python.org
4
5"""Base class for MIME type messages that are not multipart."""
6from __future__ import unicode_literals
7from __future__ import division
8from __future__ import absolute_import
9
10__all__ = ['MIMENonMultipart']
11
12from future.backports.email import errors
13from future.backports.email.mime.base import MIMEBase
14
15
16class MIMENonMultipart(MIMEBase):
17 """Base class for MIME multipart/* type messages."""
18
19 def attach(self, payload):
20 # The public API prohibits attaching multiple subparts to MIMEBase
21 # derived subtypes since none of them are, by definition, of content
22 # type multipart/*
23 raise errors.MultipartConversionError(
24 'Cannot attach additional subparts to non-multipart/*')