ansible - ansible中如何将列表转换为列表列表

Question

我有一个列表，并将拆分转换为列表列表，请查找下面的示例，

List: ['sk','bk', 'ab','4',,'5',6','ku','in']
Expected output:
[
[sk','bk', 'ab','4'],
['5',6','ku','in]
]

注意:如果列表包含 12 个元素，则预期输出应有 3 个列表

你能知道如何在ansible中做到这一点

提前致谢，森蒂尔

Answer 1

还有更多选择。

给定列表声明变量step

  l: ['sk', 'bk', 'ab', '4', '5', '6', 'ku', 'in', '12', '34', '56', '78']
  step: 4

1. 使用 Jinja 过滤器 batch

  l_batch: "{{ l|batch(step) }}"

给出

  l_batch:
    - [sk, bk, ab, '4']
    - ['5', '6', ku, in]
    - ['12', '34', '56', '78']

---

使用Extended loop variables

    - debug:
        msg: "{{ _batch|to_yaml }}"
      loop: "{{ range(step, l_lenght|int + step, step)|list }}"
      loop_control:
        label: "{{ item }}"
        extended: true
      vars:
        l_lenght: "{{ l|length }}"
        split0: "{{ ansible_loop.previtem|default(0) }}"
        split1: "{{ ansible_loop.last|ternary(l_lenght, item) }}"
        _batch: "{{ l[split0|int:split1|int] }}"

给出了删节

  msg: [sk, bk, ab, '4']
  msg: ['5', '6', ku, in]
  msg: ['12', '34', '56', '78']

---

创建自定义过滤器插件

shell> cat plugins/filter/list_methods.py
def list_split_period(l, p):
    split_list = []
    for i in range(p, len(l) + p, p):
        if i == p:
            split_list.append(l[0:p])
            j = i
        elif i > len(l):
            split_list.append(l[j:])
        else:
            split_list.append(l[j:i])
            j = i
    return split_list


class FilterModule(object):

    def filters(self):
        return {
            'list_split_period': list_split_period,
        }

然后，声明变量

  l_split: "{{ l|list_split_period(step) }}"

给出

  l_split:
    - [sk, bk, ab, '4']
    - ['5', '6', ku, in]
    - ['12', '34', '56', '78']

---

注释:

• 用于测试的完整剧本示例

- hosts: localhost

  vars:

    l: ['sk', 'bk', 'ab', '4', '5', '6', 'ku', 'in', '12', '34', '56', '78']
    step: 4

    l_batch: "{{ l|batch(step) }}"
    l_split: "{{ l|list_split_period(step) }}"

  tasks:

    - debug:
        var: l_batch|to_yaml

    - debug:
        var: l_split|to_yaml

    - debug:
        msg: "{{ _batch|to_yaml }}"
      loop: "{{ range(step, l_lenght|int + step, step)|list }}"
      loop_control:
        label: "{{ item }}"
        extended: true
      vars:
        l_lenght: "{{ l|length }}"
        split0: "{{ ansible_loop.previtem|default(0) }}"
        split1: "{{ ansible_loop.last|ternary(l_lenght, item) }}"
        _batch: "{{ l[split0|int:split1|int] }}"

• 设置步骤:5给出

  l_batch:
    - [sk, bk, ab, '4', '5']
    - ['6', ku, in, '12', '34']
    - ['56', '78']

  l_split:
    - [sk, bk, ab, '4', '5']
    - ['6', ku, in, '12', '34']
    - ['56', '78']

  msg: [sk, bk, ab, '4', '5']
  msg: ['6', ku, in, '12', '34']
  msg: ['56', '78']

• 为了您的方便，该插件可与其他插件一起使用 List methods at GitHub .