Merge email package 4.0 from the sandbox, including documentation, test cases,
and NEWS updates.
diff --git a/Lib/email/mime/nonmultipart.py b/Lib/email/mime/nonmultipart.py
new file mode 100644
index 0000000..dd280b5
--- /dev/null
+++ b/Lib/email/mime/nonmultipart.py
@@ -0,0 +1,26 @@
+# 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__