# Copyright (C) 2002-2006 Python Software Foundation

# Author: Barry Warsaw

# Contact: email-sig@python.org

"""Base class for MIME type messages that are not multipart."""

__all__ = ['MIMENonMultipart']

from email import errors

from email.mime.base import MIMEBase

class MIMENonMultipart(MIMEBase):

    """Base class for MIME multipart/* type messages."""

    __pychecker__ = 'unusednames=payload'

    def attach(self, payload):

        # The public API prohibits attaching multiple subparts to MIMEBase

        # derived subtypes since none of them are, by definition, of content

        # type multipart/*

        raise errors.MultipartConversionError(

            'Cannot attach additional subparts to non-multipart/*')

    del __pychecker__