code: def _update_tasks_redundancy(config, task_id, redundancy, limit=300, offset=0):
      
      try:
          project = find_project_by_short_name(config.project['short_name'],
                                               config.pbclient,
                                               config.all)
          if task_id:
              response = config.pbclient.find_tasks(project.id, id=task_id)
              check_api_error(response)
              task = response[0]
              task.n_answers = redundancy
              response = config.pbclient.update_task(task)
              check_api_error(response)
              msg = "Task.id = %s redundancy has been updated to %s" % (task_id,
                                                                        redundancy)
              return msg
          else:
              limit = limit
              offset = offset
              tasks = config.pbclient.get_tasks(project.id, limit, offset)
              with click.progressbar(tasks, label="Updating Tasks") as pgbar:
                  while len(tasks) > 0:
                      for t in pgbar:
                          t.n_answers = redundancy
                          response = config.pbclient.update_task(t)
                          check_api_error(response)
                          # Check if for the data we have to auto-throttle task update
                          sleep, msg = enable_auto_throttling(config, tasks)
                          # If auto-throttling enabled, sleep for sleep seconds
                          if sleep:  # pragma: no cover
                              time.sleep(sleep)
                      offset += limit
                      tasks = config.pbclient.get_tasks(project.id, limit, offset)
                  return "All tasks redundancy have been updated"
      except exceptions.ConnectionError:
          return ("Connection Error! The server %s is not responding" % config.server)
      except (ProjectNotFound, TaskNotFound):
          raise
docs: Update tasks redundancy from a project.