# Copyright (C) 2001-2006 Python Software Foundation# Author: Barry Warsaw# Contact: email-sig@python.org"""Base class for MIME specializations."""__all__=['MIMEBase']fromemailimportmessageclassMIMEBase(message.Message):"""Base class for MIME specializations."""def__init__(self,_maintype,_subtype,**_params):"""This constructor adds a Content-Type: and a MIME-Version: header. The Content-Type: header is taken from the _maintype and _subtype arguments. Additional parameters for this header are taken from the keyword arguments. """message.Message.__init__(self)ctype='%s/%s'%(_maintype,_subtype)self.add_header('Content-Type',ctype,**_params)self['MIME-Version']='1.0'