fix(retail): add region tag for Python - Update rejoin user events

[rebeccaellis]

Description

Fixes #415382524

Note: Before submitting a pull request, please open an issue for discussion if you are not associated with Google.

Checklist

• I have followed Sample Guidelines from AUTHORING_GUIDE.MD
• README is updated to include all relevant information
• Tests pass: nox -s py-3.9 (see Test Environment Setup)
• Lint pass: nox -s lint (see Test Environment Setup)
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• Please merge this PR for me once it is approved

[snippet-bot]

Here is the summary of changes.

You are about to add 1 region tag.

• retail/interactive-tutorials/events/rejoin_user_event.py:18, tag retail_rejoin_user_events

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[gemini-code-assist]

Summary of Changes

Hello @rebeccaellis, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on improving the discoverability and documentation of the existing rejoin_user_event Python sample. By introducing standard region tags, the sample code can be automatically identified and included in documentation, enhancing its utility for users.

Highlights

• Sample Documentation: Added [START] and [END] region tags to the rejoin_user_event.py sample. This change enables automated documentation generation and easier extraction of this specific code snippet for use in official documentation.

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[gemini-code-assist]

Code Review

This pull request adds region tags to the rejoin_user_event.py script. I've provided one medium severity suggestion to improve the script's structure by wrapping the main execution logic in an if __name__ == '__main__': block. This aligns with Python best practices and enhances the code's maintainability.

[gemini-code-assist]

To improve the maintainability and reusability of this script, it's a Python best practice to place executable code inside an if __name__ == '__main__': block. This prevents the script's main logic from running automatically when its contents are imported into other modules, making the code more robust and easier to test programmatically without relying on a subprocess. Since this file is now being designated as a sample with region tags, adhering to this convention is particularly important.

Suggested change

	write_user_event(visitor_id)
	call_rejoin_user_events()
	purge_user_event(visitor_id)
	# [END retail_rejoin_user_events]
	if __name__ == "__main__":
	write_user_event(visitor_id)
	call_rejoin_user_events()
	purge_user_event(visitor_id)
	# [END retail_rejoin_user_events]

[shawnmjones]

Thank you. Looks good. Since you're adding region tags even though the other tests haven't passed yet I'm approving.