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