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[Feature] Test Python 3.14#840

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jan-janssen wants to merge 8 commits intomainfrom
Py314u
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[Feature] Test Python 3.14#840
jan-janssen wants to merge 8 commits intomainfrom
Py314u

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@jan-janssen jan-janssen commented Oct 8, 2025 •
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Summary by CodeRabbit

  • Chores
    • Expanded official Python support to include 3.14.
    • Adjusted compatibility range to allow installation on Python 3.14 environments.
    • Updated package metadata to reflect broader interpreter support and ensure correct pip install behavior.
    • Improves compatibility checks during installation for users on newer Python versions.
    • No changes required for existing users on earlier supported versions.

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coderabbitai bot commented Oct 8, 2025 •
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📝 Walkthrough

Walkthrough

Updated Python version metadata in pyproject.toml: widened requires-python upper bound to <3.15 and added Python 3.14 to classifiers.

Changes

Cohort / File(s) Summary of Changes
Python version metadata
pyproject.toml		 - Widened project.requires-python upper bound from <3.14 to <3.15
- Added Programming Language :: Python :: 3.14 to classifiers

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

  • Increase minimum python version #737 — Also changes Python version constraints in pyproject.toml, modifying the lower bound operator; closely related to version requirement updates.

Poem

A whisk of versions, hop so light,
From 3.14 we take our flight—
Bounds extended, tidy and neat,
Metadata carrots, crisp and sweet.
Thump-thump! The release feels right,
Onward to builds that run just right. 🥕🐇

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)
Check name Status Explanation
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage ✅ Passed No functions found in the changes. Docstring coverage check skipped.
Title check ✅ Passed The title accurately describes the main change: updating Python compatibility to support Python 3.14.
✨ Finishing touches
🧪 Generate unit tests (beta)
  • Create PR with unit tests
  • Post copyable unit tests in a comment
  • Commit unit tests in branch Py314u

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codecov bot commented Oct 8, 2025 •
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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.83%. Comparing base (7e9bf9b) to head (56861b1).

Additional details and impacted files 
@@           Coverage Diff           @@
##             main     #840   +/-   ##
=======================================
  Coverage   93.83%   93.83%           
=======================================
  Files          38       38           
  Lines        1962     1962           
=======================================
  Hits         1841     1841           
  Misses        121      121

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

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  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

@jan-janssen jan-janssen marked this pull request as draft October 8, 2025 18:24
@jan-janssen jan-janssen changed the title Test Python 3.14 [Feature] Test Python 3.14 Jan 4, 2026
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jan-janssen commented Jan 4, 2026 

      The following packages are incompatible
      ├─ pygraphviz =1.14 * is installable with the potential options
      │  ├─ pygraphviz 1.14 would require
      │  │  └─ python_abi =3.10 *_cp310, which can be installed;
      │  ├─ pygraphviz 1.14 would require
      │  │  ├─ python >=3.11,<3.12.0a0 *, which can be installed;
      │  │  └─ python_abi =3.11 *_cp311, which can be installed;
      │  ├─ pygraphviz 1.14 would require
      │  │  ├─ python >=3.12,<3.13.0a0 *, which can be installed;
      │  │  └─ python_abi =3.12 *_cp312, which can be installed;
      │  └─ pygraphviz 1.14 would require
      │     ├─ python [>=3.13,<3.14.0a0 *_cp313|>=3.13.0rc2,<3.14.0a0 *_cp313], which can be installed;
      │     └─ python_abi =3.13 *_cp313, which can be installed;
      └─ python =3.14 * is not installable because there are no viable options
         ├─ python [3.14.0|3.14.1|3.14.2] would require
         │  └─ python_abi =3.14 *_cp314t, which conflicts with any installable versions previously reported;
         ├─ python [3.14.0|3.14.1|3.14.2] would require
         │  └─ python_abi =3.14 *_cp314, which conflicts with any installable versions previously reported;
         └─ python [3.14.0rc1|3.14.0rc2|3.14.0rc3] would require
            └─ _python_rc =* *, which does not exist (perhaps a missing channel).

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jan-janssen commented Feb 7, 2026 

======================================================================
ERROR: test_args (integration.test_pyiron_workflow.TestDynamicallyDefinedObjects.test_args)
We should be able to use a dynamically defined return value.
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/runner/work/executorlib/executorlib/tests/integration/test_pyiron_workflow.py", line 84, in test_args
    fs.result().attribute_on_dynamic,
    ~~~~~~~~~^^
  File "/home/runner/miniconda3/envs/test/lib/python3.14/concurrent/futures/_base.py", line 450, in result
    return self.__get_result()
           ~~~~~~~~~~~~~~~~~^^
  File "/home/runner/miniconda3/envs/test/lib/python3.14/concurrent/futures/_base.py", line 395, in __get_result
    raise self._exception
executorlib.standalone.interactive.communication.ExecutorlibSocketError: SocketInterface crashed during execution.
======================================================================
ERROR: test_return (integration.test_pyiron_workflow.TestDynamicallyDefinedObjects.test_return)
We should be able to use a dynamic return value -- in this case, a
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/runner/work/executorlib/executorlib/tests/integration/test_pyiron_workflow.py", line 202, in test_return
    fs.result(),
    ~~~~~~~~~^^
  File "/home/runner/miniconda3/envs/test/lib/python3.14/concurrent/futures/_base.py", line 450, in result
    return self.__get_result()
           ~~~~~~~~~~~~~~~~~^^
  File "/home/runner/miniconda3/envs/test/lib/python3.14/concurrent/futures/_base.py", line 395, in __get_result
    raise self._exception
executorlib.standalone.interactive.communication.ExecutorlibSocketError: SocketInterface crashed during execution.
----------------------------------------------------------------------

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jan-janssen commented Feb 14, 2026 

Traceback (most recent call last):
  File "/home/runner/miniconda3/envs/test/lib/python3.14/site-packages/executorlib/backend/interactive_serial.py", line 93, in <module>
    main(argument_lst=sys.argv)
    ~~~~^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runner/miniconda3/envs/test/lib/python3.14/site-packages/executorlib/backend/interactive_serial.py", line 41, in main
    input_dict = interface_receive(socket=socket)
  File "/home/runner/miniconda3/envs/test/lib/python3.14/site-packages/executorlib/standalone/interactive/communication.py", line 270, in interface_receive
    return cloudpickle.loads(socket.recv())
           ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
TypeError: _partial_new() missing 1 required positional argument: 'func'

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jan-janssen commented Feb 14, 2026

@liamhuber Somehow the integration tests fail with Python 3.14. It seems to be related to the use of partialmethod in the decorator:

def dynamic_foo():
    """
    A decorator for dynamically modifying the Foo class to test
    CloudpickleProcessPoolExecutor.

    Overrides the `fnc` input of `Foo` with the decorated function.
    """

    def as_dynamic_foo(fnc: Callable):
        return type(
            "DynamicFoo",
            (Foo,),  # Define parentage
            {"__init__": partialmethod(Foo.__init__, fnc)},
        )

    return as_dynamic_foo

I was wondering if you had similar issues with pyiron_workflow. Did you test Python 3.14 already?

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jan-janssen commented Feb 14, 2026

It seems to be a cloudpickle related issue cloudpipe/cloudpickle#585

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liamhuber commented Feb 15, 2026

I haven't tested 3.14 for workflow yet, so I'm not sure. I've done it only(?) for snippets, but that is pretty trivial.

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