[py] Use Self as return type of __enter__ in remote.WebDriver

[pinterior]

🔗 Related Issues

Fixes #17169

💥 What does this PR do?

change the return type of s.w.remote.webdriver.WebDriver.__enter__ from s.w.remote.webdriver.WebDriver to Self.
as a result, drv.get_log in the following code can be resolved as expected.

with selenium.webdriver.chrome.webdriver.WebDriver() as drv:
    reveal_type(drv.get_log)

🔧 Implementation Notes

since selenium currently supports Python 3.10, i used typing_extensions.Self instead of typing.Self.

💡 Additional Considerations

🔄 Types of changes

• Bug fix (backwards compatible)

[qodo-code-review]

Review Summary by Qodo

Use Self type for WebDriver __enter__ return type

🐞 Bug fix

Walkthroughs

Description

• Changes __enter__ return type from WebDriver to Self
• Enables proper type inference for context manager usage
• Imports Self from typing_extensions for Python 3.10 compatibility

File Changes

1. py/selenium/webdriver/remote/webdriver.py 🐞 Bug fix +3/-1

Update WebDriver __enter__ to use Self type

• Added import of Self from typing_extensions
• Changed __enter__ method return type annotation from "WebDriver" to Self
• Improves type checking for context manager pattern usage

py/selenium/webdriver/remote/webdriver.py

---

[qodo-code-review]

Code Review by Qodo

🐞 Bugs (0) 📘 Rule violations (1) 📎 Requirement gaps (0)

1. No test for __enter__ typing 📘 Rule violation ⛯ Reliability

Description

This PR is a typing bug fix to WebDriver.__enter__, but it does not add any unit/mypy regression
coverage to prevent the return type from regressing. That increases the risk of future changes
silently reintroducing the type-resolution issue.

Code

py/selenium/webdriver/remote/webdriver.py[R292-293]

+    def __enter__(self) -> Self:
        return self

Evidence

The checklist requires fixes to be accompanied by appropriate tests when feasible (PR Compliance ID
5). The PR description labels this as a bug fix and the changed code shows the updated __enter__
return type, but there are no accompanying test/type-check assertions added in this PR to lock in
the new typing behavior.

AGENTS.md
py/selenium/webdriver/remote/webdriver.py[292-293]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

## Issue description
A typing-focused bug fix changed `WebDriver.__enter__` to return `Self`, but the PR adds no regression coverage to ensure type checkers keep inferring the `with ... as drv` variable as the concrete driver type.

## Issue Context
The PR is intended to improve type resolution (e.g., resolving `drv.get_log` after `with ... as drv:`). Adding a mypy-only assertion (e.g., under `TYPE_CHECKING` using `typing_extensions.assert_type` and `cast`) would provide fast, stable coverage without introducing a browser test.

## Fix Focus Areas
- py/selenium/webdriver/remote/webdriver.py[289-294]

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[cgoldberg]

LGTM 👍
thanks.

[cgoldberg]

CI is going to fail on this branch because of a bug in Firefox beta.. it's unrelated to this PR.