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

[rebeccaellis]

Description

Fixes #415382524

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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/purge_user_event.py:18, tag retail_purge_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 adds region tags to the purge_user_event.py file. These tags are used to identify specific sections of code for documentation or other purposes.

Highlights

• Region Tag: Added a region tag [START retail_purge_user_events] at the beginning of the purge_user_event.py script.
• Region Tag: Added a region tag [END retail_purge_user_events] at the end of the call_purge_user_events function in the purge_user_event.py script.

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[gemini-code-assist]

Code Review

This pull request adds region tags to the purge_user_event.py sample. The placement of the END region tag should be adjusted to include the script's execution logic within the region tag.

[gemini-code-assist]

The placement of this END tag makes the code snippet for documentation incomplete. The function calls write_user_event(visitor_id) and call_purge_user_events() are excluded from the region tag. Move this END tag to after the call_purge_user_events() call on line 57 to include the execution logic within the region tag.