CODEWITHSUNDEEP
ansiblejinja2
AirOnSkin
AirOnSkin

Reputation: 33

Ansible & Jinja2: Convert two lists into key, value dict

I would like to combine two lists into a key, value dictionary in Ansible.

I have the following lists (AWS resource IDs):

ok: [localhost] => {
    "vpc_natgw_ids": [
        [
            "vpc-123",
            "vpc-234",
            "vpc-345",
            "vpc-456"
        ],
        [
            "nat-098",
            "nat-987",
            "nat-876",
            "nat-765"
        ]
    ]
}

The first item in the first list corresponds to the first item in the second list, the second item to the other second item and so on.

I'd like to combine the two lists to get a dict like so:

ok: [localhost] => {
    "vpc_natgw_ids_dict": [
        "vpc-123": "nat-098",
        "vpc-234": "nat-987",
        "vpc-345": "nat-876",
        "vpc-456": "nat-765"
    ]
}

How would I achieve something like this?

Upvotes: 3

Views: 3950

Answers (2)

AirOnSkin
AirOnSkin

Reputation: 33

Another solution posted by IRC user seschwar in #ansible on freenode.net works as well by utilizing Jinja2:

- set_fact:
    vpc_natgw_ids_dict: >-
      {%- set ns = namespace(ids={}) -%}
      {%- for i in vpc_natgw_ids[0] -%}
        {{- ns.ids.__setitem__(vpc_natgw_ids[0][loop.index0], vpc_natgw_ids[1][loop.index0]) -}}
      {%- endfor -%}
      {{- ns.ids -}}
- debug:
    var: vpc_natgw_ids_dict

Upvotes: 0

techraf
techraf

Reputation: 68469

For example this way:

set_fact:
  vpc_natgw_ids_dict: "{{ dict(vpc_natgw_ids[0] | zip(vpc_natgw_ids[1])) }}"

Upvotes: 4

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