Drop support for python 3.9 in trezor-firmware

[M1nd3r]

Note: Does not affect minimal required python versions of python-trezor (trezorlib, trezorctl) and other projects (e.g. toiftool).

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: c3293d4a-b9db-4466-b9d5-d1b35381def6

📥 Commits

Reviewing files that changed from the base of the PR and between 61d6be4 and 20a5fff.

⛔ Files ignored due to path filters (1)

• uv.lock is excluded by !**/*.lock

📒 Files selected for processing (2)

• docs/legacy/index.md
• pyproject.toml

🚧 Files skipped from review as they are similar to previous changes (2)

• pyproject.toml
• docs/legacy/index.md

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Walkthrough

The minimum Python version requirement was raised from >=3.9 to >=3.10 in pyproject.toml and the local development documentation (docs/legacy/index.md). The upper bound (<4) and all other configuration, dependencies, and code remain unchanged.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	The description provides important context clarifying that the change does not affect related projects, but does not follow the repository's template structure with required sections for core developer setup and development status.	Clarify whether this PR follows the template requirements for core developers (project assignment, priority, team, sprint, development status) and include a 'Testable' or 'Not Testable' note for post-merge status.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately and specifically describes the main change—dropping Python 3.9 support in trezor-firmware—which aligns with the modifications to pyproject.toml and documentation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch m1nd3r/drop-python-3-9

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[github-actions]

en main(all)

model	device_test	click_test	persistence_test
T2T1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3B1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3T1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3W1	test(all) main(all)	test(all) main(all)	test(all) main(all)

Latest CI run: 22958802919

[coderabbitai]

🧹 Nitpick comments (1)

pyproject.toml (1)

6-6: Update stale Python version markers to align with the 3.10+ minimum.

The marker python_version >= '3.8' on line 55 (toiftool dependency) is now redundant given requires-python = ">=3.10,<4". Either simplify it to "toiftool" or update it to >= '3.10' for consistency. Additionally, docs/legacy/index.md references Python 3.9 as the minimum, which should be updated to 3.10.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@pyproject.toml` at line 6, Update dependency markers and docs to match the
declared Python range requires-python = ">=3.10,<4": remove or change the
redundant extras marker on the toiftool dependency (replace the conditional
marker python_version >= '3.8' with either no marker i.e. "toiftool" or update
it to python_version >= '3.10'), and update the minimum Python version text in
docs/legacy/index.md from 3.9 to 3.10 so documentation and dependency markers
are consistent with requires-python.

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In `@pyproject.toml`:
- Line 6: Update dependency markers and docs to match the declared Python range
requires-python = ">=3.10,<4": remove or change the redundant extras marker on
the toiftool dependency (replace the conditional marker python_version >= '3.8'
with either no marker i.e. "toiftool" or update it to python_version >= '3.10'),
and update the minimum Python version text in docs/legacy/index.md from 3.9 to
3.10 so documentation and dependency markers are consistent with
requires-python.

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ℹ️ Review info

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between bfe88d2 and 8394d8f.

⛔ Files ignored due to path filters (1)

• uv.lock is excluded by !**/*.lock

📒 Files selected for processing (1)

• pyproject.toml

[obrusvit]

LGTM, thanks.