@attachment.setter<EOL><INDENT>def attachment(self, attachment):<DEDENT>
if isinstance(attachment, list):<EOL><INDENT>for a in attachment:<EOL><INDENT>self.add_attachment(a)<EOL><DEDENT><DEDENT>else:<EOL><INDENT>self.add_attachment(attachment)<EOL><DEDENT>
Add attachment(s) to this email

        :param attachment: Add attachment(s) to this email
        :type attachment: Attachment, list(Attachment)