1 files changed, 20 insertions, 0 deletions
diff --git a/Lib/email/MIMENonMultipart.py b/Lib/email/MIMENonMultipart.py
new file mode 100644
index 0000000000..899c784aa4
--- /dev/null
+++ b/Lib/email/MIMENonMultipart.py
@@ -0,0 +1,20 @@
+# 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/*')