ref: b86915f33eb80f11dead18af2c93d6d465e23a66
dir: /sys/lib/python/email/mime/nonmultipart.py/
# 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__