| # Copyright (C) 2002 Python Software Foundation | 
 | # Author: barry@zope.com (Barry Warsaw) | 
 |  | 
 | """Base class for MIME type messages that are not multipart. | 
 | """ | 
 |  | 
 | from email import Errors | 
 | from email import MIMEBase | 
 |  | 
 |  | 
 |  | 
 | class MIMENonMultipart(MIMEBase.MIMEBase): | 
 |     """Base class for MIME multipart/* type messages.""" | 
 |  | 
 |     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/*') |