Add tox for Python testing

[cgoldberg]

User description

Description

This PR adds a minimal tox configuration (tox.ini) for running the Python example tests across multiple Python versions. (see: https://tox.wiki)

You can run the tests against all Python versions 3.9-3.13 by running tox, or you can run against a specific environment: tox -e py313

I didn't change CI to use this because, we are already testing against all supported Python versions in the workflow.

Motivation and Context

This is just a convenience for running local tests and can be used in the future when we add linting.

Types of changes

• Test infrastructure added

Checklist

• I have read the contributing document.
• I have used hugo to render the site/docs locally and I am sure it works.

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PR Type

Tests, Enhancement

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Description

• Add tox.ini for multi-version Python test automation

• Update requirements.txt to include tox dependency

• Enable local testing across Python 3.9-3.13 with tox

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Changes walkthrough 📝

	Relevant files
Tests	tox.ini Add tox.ini for Python multi-version test automation          examples/python/tox.ini Introduces new tox.ini configuration file Defines environments for Python 3.9 through 3.13 Configures pytest command with verbose and summary options Enables skipping missing interpreters for flexible local testing +30/-0
Enhancement	requirements.txt Add tox to Python requirements for local testing                  examples/python/requirements.txt Adds tox==4.25.0 to requirements Ensures tox is available for local test runs +1/-0

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PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
Security	Limit environment variable exposure *The passenv = configuration is overly permissive as it passes all environment variables to the test environment. This can lead to inconsistent test results when tests depend on environment-specific variables. Consider limiting to only necessary environment variables. examples/python/tox.ini [21-30] [testenv] description = run tests -passenv = * +passenv = + PYTHONPATH + HOME + CI deps = -r requirements.txt commands = # "-vv" means extra verbose # "-r fEsxXp" means show extra test summary info as specified by: # (f)ailed, (E)rror, (s)kipped, (x)failed, (X)passed, (p)assed pytest -vv -r fEsxXp {posargs:.} Apply this suggestion Suggestion importance[1-10]: 7 __ Why: The suggestion improves security by limiting environment variable exposure instead of passing all variables with "passenv = *". This reduces the risk of test inconsistencies and potential security issues by explicitly specifying only necessary environment variables.	Medium
Update

[harsha509]

HI @cgoldberg ,

Would it be helpful to add this information to the Selenium documentation page at https://www.selenium.dev/documentation/webdriver/getting_started/using_selenium/?

Thanks,
Sri

[cgoldberg]

@harsha509

Yes, it makes sense to add a note to that page.

I just had a look at it and there is some outdated information for running the Python tests. It refers to using unittest and shows examples of doing unittest setup/teardown methods. The tests all require pytest nowadays, and use fixtures for setup/teardown.

I will update that page with more relevant information for running Python tests.

[cgoldberg]

@harsha509

I just viewed that page again, and it actually doesn't make sense to add any more info there. The change in this PR is only relevant for running the Python example tests in this repo, not selenium in general.

A more relevant place for this information would be in ./examples/python/README.md in this repo. I will add a note there.

[cgoldberg]

@harsha509 ok.. README is updated.

[harsha509]

Ah, makes sense.

LGTM!
Thank you @cgoldberg !