def __len__(self):
        _, _, data = self.resource.get_json()
        return data['doc_count']
Return the set of e-mail addresses for the recipients.
dataset/ETHPy150Open djc/couchdb-python/couchdb/client.py/Database.__len__--crossover with--dataset/ETHPy150Open reviewboard/reviewboard/reviewboard/notifications/email.py/recipients_to_addresses