# Type 'GroupTuple' is unsupported in variable storage **URL:** \ **Category:** Get Help\ **Tags:** jinja2\ **Created:** [September 18, 2025, 4:33pm UTC](https://forum.ansible.com/t/type-grouptuple-is-unsupported-in-variable-storage/44513 "2025-09-18T16:33:48Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![vbotka](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/vbotka/32/359_2.png) [@vbotka](https://forum.ansible.com/u/vbotka)\ **Post date:** [September 18, 2025, 4:33pm UTC](https://forum.ansible.com/t/type-grouptuple-is-unsupported-in-variable-storage/44513/1 "2025-09-18T16:33:49Z")
Given the list ```yaml data: - {group: devel, team: dev_1, users: [alice, bob]} - {group: devel, team: dev_2, users: [charlie, david]} - {group: qa, team: qa_1, users: [mallory, ted]} ``` The Jinja filter [groupby](https://jinja.palletsprojects.com/en/latest/templates/#jinja-filters.groupby) works as expected. The below debug task ```yaml - debug: msg: "{{ data | groupby('group') }}" ``` however, shows this warning ```yaml TASK [debug] ******************************************************************************************************** [WARNING]: Type 'GroupTuple' is unsupported in variable storage, converting to 'list'. Origin: /export/scratch/sandbox/tmp1/test-187/pb6.yml:13:14 11 12 - debug: 13 msg: "{{ data | groupby('group') }}" ^ column 14 ok: [localhost] => msg: - - devel - - group: devel team: dev_1 users: - alice - bob - group: devel team: dev_2 users: - charlie - david - - qa - - group: qa team: qa_1 users: - mallory - ted ``` Explicit conversion doesn’t help ```yaml - debug: msg: "{{ data | groupby('group') | list }}" ``` I don’t understand. The below debug ```yaml - debug: msg: | {{ data | type_debug }} {{ result | type_debug }} {{ result }} vars: result: "{{ data | groupby('group') }}" ``` shows no warnings. But, I see the warning again if the _result_ is used in a loop ```yaml - debug: var: item loop: "{{ result }}" vars: result: "{{ data | groupby('group') }}" ``` Is this a bug? ---
**Author:** ![Lyle\_McKarns](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/lyle_mckarns/32/8142_2.png) [@Lyle\_McKarns](https://forum.ansible.com/u/Lyle_McKarns)\ **Post date:** [September 18, 2025, 5:31pm UTC](https://forum.ansible.com/t/type-grouptuple-is-unsupported-in-variable-storage/44513/2 "2025-09-18T17:31:37Z")
The first thing I’d try is to use a key name other than “group” since that _could be_ a reserved keyword. ---
**Author:** ![sivel](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/sivel/32/1198_2.png) [@sivel](https://forum.ansible.com/u/sivel)\ **Post date:** [September 18, 2025, 5:53pm UTC](https://forum.ansible.com/t/type-grouptuple-is-unsupported-in-variable-storage/44513/3 "2025-09-18T17:53:49Z")
> [@vbotka](#): > > ```auto > - debug: > msg: "{{ data | groupby('group') }}" > > ``` Update this to: ```auto - debug: msg: "{{ data | groupby('group')|map('list') }}" ``` That is what is happening under the hood anyway, when the `GroupTuple` is found. This basically requires an explicit action, or that is what the warning is wanting you to do, because this is a “lossy” operation, which loses information in the “namedtuple” that jinja2 is returning. The reason for this is that there is no standard JSON serialization for a namedtuple, it requires making a decision about this, and in this case, it’s probably ok for your use to just explicitly convert the inner items to a list. ---
**Author:** ![vbotka](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/vbotka/32/359_2.png) [@vbotka](https://forum.ansible.com/u/vbotka)\ **Post date:** [September 18, 2025, 9:01pm UTC](https://forum.ansible.com/t/type-grouptuple-is-unsupported-in-variable-storage/44513/4 "2025-09-18T21:01:17Z")
Thank you. Do I have to explicitly convert all such filters to eliminate these particular warnings? Is the user now responsible for handling this? This situation is weird. This debug ```yaml - debug: msg: | {{ result }} vars: result: "{{ data | groupby('group') }}" ``` converts the tuples to lists and shows the warning ```yaml TASK [debug] ******************************************************************************************************** [WARNING]: Type 'GroupTuple' is unsupported in variable storage, converting to 'list'. Origin: /export/scratch/sandbox/tmp1/test-187/pb8.yml:23:14 21 22 - debug: 23 msg: | ^ column 14 ok: [localhost] => msg: - - devel - - group: devel team: dev_1 users: - alice - bob - group: devel team: dev_2 users: - charlie - david - - qa - - group: qa team: qa_1 users: - mallory - ted ``` But, adding a trivial line ```yaml - debug: msg: | {{ inventory_hostname }} {{ result }} vars: result: "{{ data | groupby('group') }}" ``` makes the block happy with GroupTuple ```yaml TASK [debug] ******************************************************************************************************** ok: [localhost] => msg: |- localhost [('devel', [{'group': 'devel', 'team': 'dev_1', 'users': ['alice', 'bob']}, {'group': 'devel', 'team': 'dev_2', 'users': ['charlie', 'david']}]), ('qa', [{'group': 'qa', 'team': 'qa_1', 'users': ['mallory', 'ted']}])] ``` Such blocks must be identified in 2.19 porting. Are there any other surprises next to _groupby_? ---
**Author:** ![vbotka](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/vbotka/32/359_2.png) [@vbotka](https://forum.ansible.com/u/vbotka)\ **Post date:** [September 19, 2025, 8:41am UTC](https://forum.ansible.com/t/type-grouptuple-is-unsupported-in-variable-storage/44513/5 "2025-09-19T08:41:06Z")
> [@Lyle\_McKarns](#): > > use a key name other than “group You probably refer to [Referencing key-value dictionary variables](https://docs.ansible.com/ansible/latest/playbook_guide/playbooks_variables.html#referencing-key-value-dictionary-variables). This is not the case here. JFYI, [YAML places no restrictions on the type of keys](https://yaml.org/spec/1.2.2/#3211-nodes). ---
**Author:** ![Lyle\_McKarns](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/lyle_mckarns/32/8142_2.png) [@Lyle\_McKarns](https://forum.ansible.com/u/Lyle_McKarns)\ **Post date:** [September 19, 2025, 2:34pm UTC](https://forum.ansible.com/t/type-grouptuple-is-unsupported-in-variable-storage/44513/6 "2025-09-19T14:34:06Z")
Thanks. It was an off the cuff “first thing I thought of” hit to rule things out. Glad you found the right answer. ---
**Author:** ![vbotka](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/vbotka/32/359_2.png) [@vbotka](https://forum.ansible.com/u/vbotka)\ **Post date:** [September 22, 2025, 7:21pm UTC](https://forum.ansible.com/t/type-grouptuple-is-unsupported-in-variable-storage/44513/7 "2025-09-22T19:21:33Z")
> [@vbotka](#): > > Are there any other surprises next to _groupby_? Yes, there are. The below play ```yaml - hosts: foo tasks: - command: zpool status register: out - debug: var: pools vars: status: "{{ out.stdout | community.general.jc('zpool-status') }}" pools: "{{ dict(status | community.general.json_query('[].[pool, config[].name]')) }}" ``` gives, for example ```yaml pools: iocage: - iocage - ada2 - ada3 zroot: - zroot - ada0p4 - ada1p4 ``` However, _ansible-lint_ complains about ```yaml pools: "{{ dict(status | community.general.json_query('[].[pool, config[].name]')) }}" ``` > jinja[invalid]: Error rendering template: ‘NoneType’ object is not iterable Mapping the items from the _json\_query_ output list to _list_ makes the lint error disappear ```yaml pools: "{{ dict(status | community.general.json_query('[].[pool, config[].name]') | map('list')) }}" ``` I have to repeat my questions: Is this a bug? Do I have to explicitly convert all such filters to eliminate these particular warnings (and errors)? Is the user now responsible for handling this? ---
**Author:** ![sivel](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/sivel/32/1198_2.png) [@sivel](https://forum.ansible.com/u/sivel)\ **Post date:** [September 22, 2025, 7:44pm UTC](https://forum.ansible.com/t/type-grouptuple-is-unsupported-in-variable-storage/44513/8 "2025-09-22T19:44:14Z")
There isn’t a single answer. The `groupby` filter is coming from upstream jinja2, and `json_query` is in `community.general`. We don’t have knowledge of every python type returned by every filter out there. It’s dependent on the filter, and the reason there is a warning, is to help try to let you know there is something that needs done. Unfortuantely we can’t know every situation, and these type of things will have to be handled on a per case basis, and using `list` is only 1 solution, for list type values. Other types may be required elsewhere, and I cannot enumerate where they may happen. ---
**Author:** ![vbotka](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/vbotka/32/359_2.png) [@vbotka](https://forum.ansible.com/u/vbotka)\ **Post date:** [September 24, 2025, 6:48am UTC](https://forum.ansible.com/t/type-grouptuple-is-unsupported-in-variable-storage/44513/9 "2025-09-24T06:48:10Z")
> [@sivel](#): > > We don’t have knowledge of every python type returned by every filter out there … try to let you know there is something that needs done. For the record (to clarify the solution): Is this a bug? `No` Do I have to explicitly convert all such filters to eliminate these particular warnings (and errors)? `Yes` Is the user now responsible for handling this? `Yes` ---
**Author:** ![utoddl](https://sea1.discourse-cdn.com/ansible/user_avatar/forum.ansible.com/utoddl/32/249_2.png) [@utoddl](https://forum.ansible.com/u/utoddl)\ **Post date:** [September 24, 2025, 4:07pm UTC](https://forum.ansible.com/t/type-grouptuple-is-unsupported-in-variable-storage/44513/10 "2025-09-24T16:07:16Z")
For the case @vbotka cited above, could something be done inside or with `community.general.json_query()` to make `ansible-lint` do the Right Thing™? A lot of people use `json_query`, and fixing a class of linting issues would be far preferable to everyone squashing those linting issues in inconsistent ways… ---
**Author:** ![system](https://us1.discourse-cdn.com/ansible/original/1X/1882d9a01da5d8996a862359b0913cc568a39b84.svg) [@system](https://forum.ansible.com/u/system)\ **Post date:** [October 24, 2025, 4:08pm UTC](https://forum.ansible.com/t/type-grouptuple-is-unsupported-in-variable-storage/44513/11 "2025-10-24T16:08:06Z")
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