Allow python 3.14 in dev environments

[NickCrews]

What happens?

I wanted to try making a proof of concept for #370. To do this, I need a python 3.14 dev environment. So I started following https://duckdb.org/docs/stable/dev/building/python, checked out the 1.5 branch (which looks like where development is happening), and ran uv sync --no-install-project --python 3.14 (on macOS). This gave:

Error Log

$ uv sync --no-install-project --python 3.14
Using CPython 3.14.2 interpreter at: /opt/homebrew/opt/python@3.14/bin/python3.14
Removed virtual environment at: .venv
Creating virtual environment at: .venv
  × No solution found when resolving dependencies for split (markers: python_full_version >= '3.14' and platform_machine == 'ARM64' and sys_platform
  │ == 'win32'):
  ╰─▶ Because only the following versions of torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32')
      or (python_full_version < '3.14' and platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and
      platform_machine == 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform ==
      'win32') or (python_full_version < '3.14' and sys_platform != 'darwin' and sys_platform != 'win32')} are available:
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}<=2.2.2
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.2.2+cpu
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.3.0
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.3.0+cpu
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.3.1
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.3.1+cpu
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.4.0
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.4.0+cpu
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.4.1
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.4.1+cpu
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.5.0
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.5.0+cpu
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.5.1
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.5.1+cpu
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.6.0
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.6.0+cpu
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.7.0
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.7.0+cpu
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.7.1
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.7.1+cpu
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.8.0
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.8.0+cpu
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.9.0
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.9.0+cpu
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.9.1
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.9.1+cpu
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.10.0
          torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14' and
      sys_platform != 'darwin' and sys_platform != 'win32')}==2.10.0+cpu
      and torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32') or (python_full_version < '3.14' and
      platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and platform_machine == 'x86_64' and sys_platform
      == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform == 'win32') or (python_full_version < '3.14'
      and sys_platform != 'darwin' and sys_platform != 'win32')}>=2.2.2 has no `python_full_version >= '3.11' and platform_machine == 'ARM64' and
      sys_platform == 'win32'`-compatible wheels, we can conclude that torch{(python_full_version >= '3.12' and python_full_version < '3.14' and
      sys_platform == 'win32') or (python_full_version < '3.14' and platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version
      < '3.13' and platform_machine == 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and
      sys_platform == 'win32') or (python_full_version < '3.14' and sys_platform != 'darwin' and sys_platform != 'win32')}>=2.2.2 cannot be used.
      And because duckdb:dev depends on torch{(python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32')
      or (python_full_version < '3.14' and platform_machine != 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.13' and
      platform_machine == 'x86_64' and sys_platform == 'darwin') or (python_full_version < '3.14' and platform_machine != 'ARM64' and sys_platform ==
      'win32') or (python_full_version < '3.14' and sys_platform != 'darwin' and sys_platform != 'win32')}>=2.2.2 and your project requires duckdb:dev,
      we can conclude that your project's requirements are unsatisfiable.

      hint: The resolution failed for an environment that is not the current one, consider limiting the environments with `tool.uv.environments`.

Which if I am interpreting right, is caused by this line:

"torch>=2.2.2; python_version < '3.14' and ( sys_platform != 'darwin' or platform_machine != 'x86_64' or python_version < '3.13' ) and ( sys_platform != 'win32' or platform_machine != 'ARM64' or python_version > '3.11' )",

in the test dependency group in our pyproject.toml

If I understand pytorch/pytorch#156856 and https://github.com/pytorch/pytorch/releases/tag/v2.10.0 correctly, then pytorch>=2.10.0 should work with python 3.14. Can we adjust our above version requirement so that my UV successfully pulls in this new pytorch version, so that I can use 3.14 for dev?

To Reproduce

(on MacOS):

uv sync --no-install-project --python 3.14

I'm not sure if there are uv flags where you can mock being on macOS? I tried all variations of

uv sync --no-install-project --python 3.14 --python-platform [all of linux, macos, windows]

and I got a similar error for all of them. So not sure if I am providing the flags wrong, or if we truly can't resolve the deps on all platforms.

OS:

OSX 26.3.1

DuckDB Package Version:

main

Python Version:

3.14

Full Name:

Nick Crews

Affiliation:

Ship Creek Group

What is the latest build you tested with? If possible, we recommend testing with the latest nightly build.

I have tested with a source build

Did you include all relevant data sets for reproducing the issue?

Yes

Did you include all code required to reproduce the issue?

• Yes, I have

Did you include all relevant configuration to reproduce the issue?

• Yes, I have

[evertlammerts]

I can't seem to reproduce this, I've been using Python 3.14 in my dev environment (on OSX) without problems and we've been using these markers in CI as well. It's hard to say what happens in your setup.

I did just push changes to the environment markers for torch because torch 2.11 has a regression on some platforms with python 3.13 (see 8cb6071), and as part of that I also added torch for the 3.14 platforms that are supported. I did a build with 3.14 locally to test, and that works fine:

uv sync --no-install-project -p 3.14
uv sync --no-build-isolation -v --reinstall

If you pull v1.5-variegata now and build, hopefully it doesn't complain anymore?

[NickCrews]

Shoot, I'm sorry for wasting your time here. It looks like I was accidentally using an old version of uv (0.8.8) from ~Aug 2025. With the newest version (0.11.1) of uv, the commands above work just fine, the requirements solve and the deps are installed.