Python 3.14 Support

[aemous]

Describe the feature

Support Python version 3.14 in AWS CLI v2, and upgrade the bundled Python interpreter to version 3.14.

Use Case

I want source distribution to support the latest new features in Python 3.14.

Proposed Solution

No response

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

CLI version used

2.32.15

Environment details (OS name and version, etc.)

MacOS 26.1

[adamjstewart]

Note that flit-core 3.10+ is required for Python 3.14 support.

[eciervo]

At the moment this is also an issue in Fedora 43, which ships with Python 3.14, and newer AWS CLI versions (Fedora is at 2.27, but I needed the new "mfa-login" from 2.30+ or "login" from 2.32).

Installing it directly gives the same error as #9821 , resolved with this workaround:

sudo dnf install awscli2 # Actually only its dependencies from the distro are needed
pip install -U --user flit_core
pip install --user --no-build-isolation git+https://github.com/aws/aws-cli.git@v2

#9822 should be able to fix that, I think.

Thank you in advance.

[tkelman]

Note that flit-core 3.10+ is required for Python 3.14 support.

Open as #9623

Also see:

• [v2] Bump ruamel-yaml from 0.17.21 to 0.19.1 #9814 for ruamel-yaml
• Bump ruamel-yaml-clib from 0.2.12 to 0.2.15 #9853 for ruamel-yaml-clib