Ansible:在Ansible inventory中使用主机范围时，如何获取当前的“主机索引”？

- name: Get host index
  hosts: all
  tasks:
    - name: Print host index
      debug:
        msg: "The index of {{ inventory_hostname }} is {{ ansible_play_hosts_all.index(inventory_hostname) }}"

TASK [Print host index] **********************************************************************************************************************
ok: [host1] => {
    "msg": "The index of host1 is 0"
}
ok: [host2] => {
    "msg": "The index of host2 is 1"
}
ok: [host3] => {
    "msg": "The index of host3 is 2"
}