dict_from_attachment doesn't set content_type in the output dict. This means that if you created an attachment using make_attachment_dict with a content type, and at some point the attachment gets passed through dict_from_attachment (e.g. when calling make_message), the content type is lost.
dict_from_attachmentdoesn't setcontent_typein the output dict. This means that if you created an attachment usingmake_attachment_dictwith a content type, and at some point the attachment gets passed throughdict_from_attachment(e.g. when callingmake_message), the content type is lost.