给出以下列表:
fruits:
- fruit: apple
color: red
texture: crunchy
shape: round
- fruit: grapefruit
color: yellow
taste: sour
- fruit: pear
color: yellow
我将如何使用items2dict过滤器更改为词典(如下)?问题是存在多个,并且数量可变。
"{{ fruits | items2dict(key_name='fruit', value_name='??????') }}
所需结果:
fruits:
- apple:
color: red
texture: crunchy
shape: round
- grapefruit:
color: yellow
taste: sour
- pear:
color: yellow
我似乎在这里找不到方法:https://docs.ansible.com/ansible/latest/user_guide/playbooks_filters.html#transforming-lists-into-dictionaries
以下任务完成了任务
- set_fact:
fruits2: "{{ fruits2|default([]) + [{ item['fruit']: value }]}}"
loop: "{{ fruits }}"
vars:
keys: "{{ item.keys()|difference(['fruit']) }}"
vals: "{{ keys|map('extract', item)|list }}"
value: "{{ dict(keys|zip(vals)) }}"
给
fruits2:
- apple:
color: red
shape: round
texture: crunchy
- grapefruit:
color: yellow
taste: sour
- pear:
color: yellow
可以通过简单地将列表的串联更改为字典的组合来创建字典,而不是列表。
- set_fact:
fruits3: "{{ fruits3|default({})|combine({ item['fruit']: value }) }}"
loop: "{{ fruits }}"
vars:
keys: "{{ item.keys()|difference(['fruit']) }}"
vals: "{{ keys|map('extract', item)|list }}"
value: "{{ dict(keys|zip(vals)) }}"
给
fruits3:
apple:
color: red
shape: round
texture: crunchy
grapefruit:
color: yellow
taste: sour
pear:
color: yellow
items2dict只能用于选择2个属性(key_name
和value_name
),例如
- set_fact:
fruits4: "{{ fruits|items2dict(key_name='fruit', value_name='color') }}"
给
fruits4:
apple: red
grapefruit: yellow
pear: yellow
不能创建列表(所需结果)items2dict
。items2dict
返回字典。
items2dict
如果属性丢失,将失败,例如
- set_fact:
fruits5: "{{ fruits|items2dict(key_name='fruit', value_name='taste') }}"
失败了
The error was: KeyError: 'taste'
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