8000 Specify recursive_guard as kwarg in FutureRef._evaluate by vfazio · Pull Request #9612 · pydantic/pydantic · GitHub
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merged 1 commit into from
Jun 10, 2024
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Specify recursive_guard as kwarg in FutureRef._evaluate #9612

merged 1 commit into from
Jun 10, 2024

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vfazio
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@vfazio vfazio commented Jun 10, 2024 •
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In CPython 3.12.4/3.13, the function signature of FutureRef._evaluate changed such that recursive_guard is no longer a positional argument; it is now keyword only 0 1.

To accommodate this, specify recursive_guard as a kwarg. This syntax is backwards compatible with earlier versions of the function signature.

Change Summary

Related issue number

Fix #9607 #9609

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  • The pull request title is a good summary of the changes - it will be used in the changelog
  • Unit tests for the changes exist
  • Tests pass on CI
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@vfazio
Specify recursive_guard as kwarg in FutureRef._evaluate
78c0401 
In CPython 3.12.4/3.13, the function signature of `FutureRef._evaluate`
changed such that `recursive_guard` is no longer a positional argument;
it is now keyword only [0][1].

To accommodate this, specify `recursive_guard` as a kwarg. This syntax
is backwards compatible with earlier versions of the function signature.

[0]: python/cpython#118104
[1]: python/cpython#118009

Signed-off-by: Vincent Fazio <vfazio@gmail.com>
@vfazio
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vfazio commented Jun 10, 2024 •
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Note that there are future problems for pydantic in CPython 3.13, but I will open a new issue for that.

#9613

@sydney-runkle
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Great, thanks!

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sydney-runkle approved these changes Jun 10, 2024
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Awesome job, thank you!

@sydney-runkle sydney-runkle merged commit 464ed49 into pydantic:1.10.X-fixes Jun 10, 2024
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@ostefano
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@sydney-runkle is a new release already scheduled to include this?

@sydney-runkle
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@ostefano,

We're planning on a V1 and V2 release at the end of June, but maybe this is pressing enough that we should do a patch. I'll chat with the team this morning and see what they think.

@ostefano
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Thank you @sydney-runkle .

Yes, unless there is a workaround / sanctioned "monkey patch", I believe this to be somehow pressing.

@vfazio
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vfazio commented Jun 10, 2024

To be transparent, I didn't have time to actually test this under 3.12.4. I don't see the 1.10.x CI matrix running on Python 3.12 at all

If we wanted warm and fuzzies, maybe there should be a quick CI update to widen the CI matrix and also add the 3.12 classifier in setup.py?

What's the EOL for pydantic v1? Should there be a cap on the required python to be <3.13 ?

@vfazio
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vfazio commented Jun 10, 2024 •
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While it was irresponsible of me, the fix does work:

Failure to import fastapi on 3.12.4 w/ pydantic 1.10.15

(venv) root@1f9ac5aadd81:/# pip install --force pydantic==1.10.15
Collecting pydantic==1.10.15
  Using cached pydantic-1.10.15-py3-none-any.whl.metadata (150 kB)
Collecting typing-extensions>=4.2.0 (from pydantic==1.10.15)
  Using cached typing_extensions-4.12.2-py3-none-any.whl.metadata (3.0 kB)
Using cached pydantic-1.10.15-py3-none-any.whl (159 kB)
Using cached typing_extensions-4.12.2-py3-none-any.whl (37 kB)
Installing collected packages: typing-extensions, pydantic
  Attempting uninstall: typing-extensions
    Found existing installation: typing_extensions 4.12.2
    Uninstalling typing_extensions-4.12.2:
      Successfully uninstalled typing_extensions-4.12.2
  Attempting uninstall: pydantic
    Found existing installation: pydantic 1.10.15
    Uninstalling pydantic-1.10.15:
      Successfully uninstalled pydantic-1.10.15
Successfully installed pydantic-1.10.15 typing-extensions-4.12.2
(venv) root@1f9ac5aadd81:/# python3 -c "import fastapi"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/venv/lib/python3.12/site-packages/fastapi/__init__.py", line 7, in <module>
    from .applications import FastAPI as FastAPI
  File "/venv/lib/python3.12/site-packages/fastapi/applications.py", line 16, in <module>
    from fastapi import routing
  File "/venv/lib/python3.12/site-packages/fastapi/routing.py", line 22, in <module>
    from fastapi import params
  File "/venv/lib/python3.12/site-packages/fastapi/params.py", line 5, in <module>
    from fastapi.openapi.models import Example
  File "/venv/lib/python3.12/site-packages/fastapi/openapi/models.py", line 124, in <module>
    class Schema(BaseModelWithConfig):
  File "/venv/lib/python3.12/site-packages/pydantic/main.py", line 286, in __new__
    cls.__try_update_forward_refs__()
  File "/venv/lib/python3.12/site-packages/pydantic/main.py", line 807, in __try_update_forward_refs__
    update_model_forward_refs(cls, cls.__fields__.values(), cls.__config__.json_encoders, localns, (NameError,))
  File "/venv/lib/python3.12/site-packages/pydantic/typing.py", line 554, in update_model_forward_refs
    update_field_forward_refs(f, globalns=globalns, localns=localns)
  File "/venv/lib/python3.12/site-packages/pydantic/typing.py", line 520, in update_field_forward_refs
    field.type_ = evaluate_forwardref(field.type_, globalns, localns or None)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/venv/lib/python3.12/site-packages/pydantic/typing.py", line 66, in evaluate_forwardref
    return cast(Any, type_)._evaluate(globalns, localns, set())
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: ForwardRef._evaluate() missing 1 required keyword-only argument: 'recursive_guard'

Fixed on new hash

(venv) root@1f9ac5aadd81:/# pip install --force git+https://github.com/pydantic/pydantic.git@464ed49b1f813103a49116476bec75a94492b338
Collecting git+https://github.com/pydantic/pydantic.git@464ed49b1f813103a49116476bec75a94492b338
  Cloning https://github.com/pydantic/pydantic.git (to revision 464ed49b1f813103a49116476bec75a94492b338) to /tmp/pip-req-build-ef3jn9pi
  Running command git clone --filter=blob:none --quiet https://github.com/pydantic/pydantic.git /tmp/pip-req-build-ef3jn9pi
  Running command git rev-parse -q --verify 'sha^464ed49b1f813103a49116476bec75a94492b338'
  Running command git fetch -q https://github.com/pydantic/pydantic.git 464ed49b1f813103a49116476bec75a94492b338
  Running command git checkout -q 464ed49b1f813103a49116476bec75a94492b338
  Resolved https://github.com/pydantic/pydantic.git to commit 464ed49b1f813103a49116476bec75a94492b338
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Installing backend dependencies ... done
  Preparing metadata (pyproject.toml) ... done
Collecting typing-extensions>=4.2.0 (from pydantic==1.10.15)
  Using cached typing_extensions-4.12.2-py3-none-any.whl.metadata (3.0 kB)
Using cached typing_extensions-4.12.2-py3-none-any.whl (37 kB)
Building wheels for collected packages: pydantic
  Building wheel for pydantic (pyproject.toml) ... done
  Created wheel for pydantic: filename=pydantic-1.10.15-py3-none-any.whl size=160302 sha256=083532569f8a0eaf5691e0dcfbf388749e0613712a709501b6cc8b5bca97b71b
  Stored in directory: /root/.cache/pip/wheels/d4/39/fc/e66b746c38076ff46a0c011166d066c4e5ebb6df6f7203e770
Successfully built pydantic
Installing collected packages: typing-extensions, pydantic
  Attempting uninstall: typing-extensions
    Found existing installation: typing_extensions 4.12.2
    Uninstalling typing_extensions-4.12.2:
      Successfully uninstalled typing_extensions-4.12.2
  Attempting uninstall: pydantic
    Found existing installation: pydantic 1.10.15
    Uninstalling pydantic-1.10.15:
      Successfully uninstalled pydantic-1.10.15
Successfully installed pydantic-1.10.15 typing-extensions-4.12.2
(venv) root@1f9ac5aadd81:/# python3 -c "import fastapi"

@sydney-runkle
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@vfazio,

Feel free to open a PR to widen the CI matrix, that sounds great. EOL is June 30th, 2024 (so coming up soon). I think a cap on the required version would be good!

@ostefano,

I suppose you could use the change made in this PR as a monkey patch for now while we work on the next release.

@vfazio
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vfazio commented Jun 10, 2024

@sydney-runkle there are places in the documentation that call out 3.11 specifically (see https://docs.pydantic.dev/latest/contributing/#prerequisites) and that's for current documentation. Before I make this PR, is 3.12 support something pydantic actually wants to advertise support for on 1.10.x?

@sydney-runkle
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EOL is June 30th, 2024 (so coming up soon).

Slight modification here - we'll likely still do fixes like this one to support the still-large number of V1 users 🚀.

@vfazio,

If all tests pass when we add the 3.12 matrices, then I think we can advertise it :).

@vfazio
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vfazio commented Jun 10, 2024

I'm going to open an issue to continue the discussion. I don't think it's quite as straightforward as I was hoping.

@ostefano
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For anybody facing this issue when using langchain, the right module to monkey patch is pydantic.v1.typing.

@vfazio
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vfazio commented Jun 10, 2024

I'm going to open an issue to continue the discussion. I don't think it's quite as straightforward as I was hoping.

#9622

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@RyoJerryYu
chore: pin python to 3.12.3
612ed06 
For pydantic issue pydantic/pydantic#9612
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python@3.12 3.12.4
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Update support of python 3.12
656ff55 
3.12.4 is not suitable - pydantic/pydantic#9612
mofr pushed a commit to WinterFramework/winter that referenced this pull request Jul 24, 2024
@sergey-bondarenko-qs
Add support of python 3.12 (#312)
54f6083 
* Add support of python 3.12
* Replaced openapi-schema-pydantic with openapi-pydantic
* 3.12.4 is not suitable - pydantic/pydantic#9612

---------

Co-authored-by: Sergey Bondarenko <>
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scy added a commit to AKVorrat/dearmep that referenced this pull request Nov 13, 2024
@scy
Pin Pydantic to >=1.10.16 and <2
d46e269 
This should fix errors in combination with Python 3.12, e.g. in build
<https://github.com/AKVorrat/dearmep/actions/runs/11783011436/job/32819299151>,
which had:

TypeError: ForwardRef._evaluate() missing 1 required keyword-only argument: 'recursive_guard'

See <pydantic/pydantic#9612>.

This is a minimal change to limit the scope, instead of risking breaking
changes.
t-muehlberger pushed a commit to AKVorrat/dearmep that referenced this pull request Nov 18, 2024
@scy @t-muehlberger
Pin Pydantic to >=1.10.16 and <2
2e45736 
This should fix errors in combination with Python 3.12, e.g. in build
<https://github.com/AKVorrat/dearmep/actions/runs/11783011436/job/32819299151>,
which had:

TypeError: ForwardRef._evaluate() missing 1 required keyword-only argument: 'recursive_guard'

See <pydantic/pydantic#9612>.

This is a minimal change to limit the scope, instead of risking breaking
changes.

(cherry picked from commit d46e269)
scy added a commit to AKVorrat/dearmep that referenced this pull request Nov 19, 2024
@scy
Pin Pydantic to >=1.10.16 and <2
764ab3a 
This should fix errors in combination with Python 3.12, e.g. in build
<https://github.com/AKVorrat/dearmep/actions/runs/11783011436/job/32819299151>,
which had:

TypeError: ForwardRef._evaluate() missing 1 required keyword-only argument: 'recursive_guard'

See <pydantic/pydantic#9612>.

This is a minimal change to limit the scope, instead of risking breaking
changes.
@scy scy mentioned this pull request Nov 19, 2024
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