code: def insert_task(self, description, tag=None, client=None):
          
          client = self._require_client(client)
  
          new_task = {
              "queueName": self.full_name,
              "payloadBase64": base64.b64encode(description).decode('ascii'),
              "tag": tag
          }
  
          response = client.connection.api_request(method='POST', path=self.path + "/tasks/", data=new_task)
          task = Task(taskqueue=self, id=response.get('id'))
          task._set_properties(response)
          return task
docs: Insert task in task queue.
  
          If the task isn't found (backend 404), raises a
          :class:`gcloud.exceptions.NotFound`.
  
          :type description: string
          :param description: Description of task to perform
  
          :type tag: string
          :param tag: Optional. The tag for this task, allows leasing tasks with a specific tag
  
          :type client: :class:`gcloud.taskqueue.client.Client` or ``NoneType``
          :param client: Optional. The client to use.  If not passed, falls back
                         to the ``client`` stored on the task's taskqueue.
  
          :rtype: :class:`_Task`.
          :returns: a task
          :raises: :class:`gcloud.exceptions.NotFound`