[py] fix return type and docstring of get_downloadable_files

[Delta456]

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Fixes doc and code comment for get_downloadable_files as per #15288 in Python binding

Motivation and Context

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

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PR Type

Bug fix, Documentation, Tests

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Description

• Fixed the return type of get_downloadable_files to list.

• Updated the docstring of get_downloadable_files to reflect the correct return type.

• Added a test assertion to verify the return type of get_downloadable_files.

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Changes walkthrough 📝

	Relevant files
Bug fix	webdriver.py Update `get_downloadable_files` return type and docstring py/selenium/webdriver/remote/webdriver.py Changed the return type of get_downloadable_files from dict to list. Updated the docstring to describe the return type as a list of file names. +2/-3
Tests	remote_downloads_tests.py Add test for `get_downloadable_files` return type                py/test/selenium/webdriver/remote/remote_downloads_tests.py Added a test assertion to check that get_downloadable_files returns a list. Verified the presence of specific file names in the returned list. +1/-0

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[qodo-code-review]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

🎫 Ticket compliance analysis ✅ 15288 - Fully compliant Compliant requirements: Fix incorrect return type documentation for get_downloadable_files() method Fix incorrect docstring description for get_downloadable_files() method Verify actual return type matches documentation

⏱️ Estimated effort to review: 1 🔵⚪⚪⚪⚪

🧪 PR contains tests

🔒 No security concerns identified

⚡ No major issues detected

[qodo-code-review]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
General	Use isinstance for type checking Replace type check with isinstance() for more robust type checking that handles subclasses correctly. py/test/selenium/webdriver/remote/remote_downloads_tests.py [31] -assert type(file_names) is list +assert isinstance(file_names, list) Apply this suggestion Suggestion importance[1-10]: 7 __ Why: Using isinstance() is a more robust way to check types as it properly handles inheritance. This is a meaningful improvement to the test's reliability.	Medium
Learned best practice	Use specific collection type hints that include the element type instead of generic collection types The return type hint list is too generic. Since this method returns a list of strings (file names), use the more specific type hint List[str]. Don't forget to import List from typing. py/selenium/webdriver/remote/webdriver.py [1384] -def get_downloadable_files(self) -> list: +from typing import List +def get_downloadable_files(self) -> List[str]: + Apply this suggestion Suggestion importance[1-10]: 6	Low
More

[VietND96]

This update also helps the implementation align with behavior in Java binding #15293.