code: def serializeCorpus(self):
          
          corpus_details = [{
                  "model": "django-tethne.corpus",
                  "pk": self.corpus_id,
                  "fields": {
                      "source": self.source,
                      "date_created":strftime("%Y-%m-%d %H:%M:%S", gmtime()),
                      "length" : len(self.corpus),
                  }
              }]
          return corpus_details
docs: This method creates a fixture for the "django-tethne_corpus" model.
          Returns
          -------
          corpus_details in JSON format which can written to a file.