使用回路拼接字符串，項目未定義

以下是我的任務代碼：

- name: Add calculation nodes of different groups to the list
  set_fact: 
    list_of_all_calculate_node: "{{  list_of_all_calculate_node | default([]) + ['random_calculate_host' + ('{{ item }}' | string ) ]  }}"
  loop: "{{ range(1,5) }}"
  delegate_to: "localhost"
  run_once: true

- name: Print  list_of_all_calculate_node
  debug:
    var: "{{ item }}"
  loop: "{{ list_of_all_calculate_node }}"

錯誤類型：致命

TASK [Print  list_of_all_calculate_node]
fatal: [*.*.*.*]: FAILED! => {"msg": "['random_calculate_host2', 'random_calculate_host3', 'random_calculate_host4', 'random_calculate_host{{ item }}']: 'item' is undefined"}

預期的輸出應該是：['random_calculate_host1','random_calculate_host2', 'random_calculate_host3', 'random_calculate_host4']