Python3 Multipartmime Email (text, Email, And Attachment)

I'm creating some emails in Python and I'd like to have HTML, text, and an attachment. My code is 'working', though its outputs are shown by Outlook as EITHER HTML or text, while s

Solution 1:

I found this has in fact been answered. Strange how the search feature is less effective than the 'related' boxes.

Sending Multipart html emails which contain embedded images