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Add filter dict_kv (#1264)

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- Add filter `dict_kv` which returns a single key-value pair dictionary created from two arguments

Example 1

```
- hosts: localhost
  gather_facts: false
  vars:
    myvar: myvalue
  tasks:
  - debug:
      msg: "{{ myvar | dict_kv('thatsmyvar') }}"

OUTPUT:
ok: [localhost] => {
    "msg": {
        "thatsmyvar": "myvalue"
    }
}
```

Example 2

```
- hosts: localhost
  gather_facts: false
  vars:
    common_config:
      type: host
      database: all
    myservers:
    - server1
    - server2
  tasks:
  - debug:
      msg: "{{ myservers | map('dict_kv', 'server') | map('combine', common_config) }}"

OUTPUT:
ok: [localhost] => {
    "msg": [
        {
            "database": "all",
            "server": "server1",
            "type": "host"
        },
        {
            "database": "all",
            "server": "server2",
            "type": "host"
        }
    ]
}
```
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Stanislav German-Evtushenko 2020-11-24 13:41:18 +09:00 • committed by GitHub
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changelogs/fragments/1264-dict_kv-new-filter.yaml Normal file
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minor_changes:
- "Add new filter plugin ``dict_kv`` which returns a single key-value pair from two arguments. Useful for generating complex dictionaries without using loops. For example ``'value' | community.general.dict_kv('key'))`` evaluates to ``{'key': 'value'}`` (https://github.com/ansible-collections/community.general/pull/1264)."