Add a document to the index

def add_doc(self, doc, index_update=True, label_guesser_update=True):
        """
        Add a document to the index
        """
        logger.info("Indexing new doc: %s" % doc)
        doc = doc.clone()  # make sure it can be serialized safely
        self.docsearch.index.add_doc(doc, index_update=index_update,
                                     label_guesser_update=label_guesser_update)