feat(secretmanager): Adding python secretmanager expiretime samples

[khilan-crest]

Adding python secretmanager expiretime samples

Fixes #

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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

[gemini-code-assist]

Summary of Changes

Hello @khilan-crest, 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 significantly enhances the Python samples for Google Cloud Secret Manager by introducing a suite of new functionalities. It provides developers with clear examples for managing the lifecycle of secrets through expiration times and for organizing secrets using tag bindings. These additions cover both globally managed and regionally deployed secrets, ensuring comprehensive coverage for various deployment scenarios.

Highlights

• Secret Expiration Management: New Python samples have been added to demonstrate how to create secrets with a defined expiration time, as well as how to update and remove expiration times from existing secrets.
• Tag Binding Operations: New samples are introduced for managing tag bindings on secrets, including functionalities to list all tags associated with a secret and to detach specific tag values.
• Regional Secret Support: All new expiration and tag management functionalities are also provided for regional secrets, ensuring comprehensive coverage for geographically distributed secret management.
• Comprehensive Testing: Corresponding unit tests have been added or updated in both global and regional snippets_test.py files to validate the correct behavior of the new samples.

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[gemini-code-assist]

Code Review

This pull request adds several new Python samples for Google Cloud Secret Manager, focusing on setting and managing expiration times and tags for secrets, for both global and regional secrets. The changes include new sample files and corresponding tests. The code is generally well-written and the new samples are a valuable addition. I've identified a few areas for improvement:

• There are some inconsistencies in docstring examples that should be aligned with the code's behavior.
• For consistency with other samples, the argparse import should be moved inside the if __name__ == "__main__" block in a few files.
• A more significant issue is the use of datetime.now(), which can lead to timezone-related bugs. I've recommended switching to datetime.utcnow() in both the sample code and the tests to ensure correctness and prevent flaky tests.

[snippet-bot]

Here is the summary of changes.

You are about to add 10 region tags.

• secretmanager/snippets/create_secret_with_expiration.py:17, tag secretmanager_create_secret_with_expiration
• secretmanager/snippets/delete_secret_expiration.py:17, tag secretmanager_delete_secret_expiration
• secretmanager/snippets/detach_tag_binding.py:18, tag secretmanager_detach_tag_binding
• secretmanager/snippets/list_tag_bindings.py:20, tag secretmanager_list_tag_bindings
• secretmanager/snippets/regional_samples/create_regional_secret_with_expire_time.py:17, tag secretmanager_create_regional_secret_with_expire_time
• secretmanager/snippets/regional_samples/delete_regional_secret_expiration.py:18, tag secretmanager_delete_regional_secret_expiration
• secretmanager/snippets/regional_samples/detach_regional_tag.py:17, tag secretmanager_detach_regional_tag_binding
• secretmanager/snippets/regional_samples/list_regional_secret_tag_bindings.py:17, tag secretmanager_list_regional_secret_tag_bindings
• secretmanager/snippets/regional_samples/update_regional_secret_expiration.py:17, tag secretmanager_update_regional_secret_expiration
• secretmanager/snippets/update_secret_expiration.py:18, tag secretmanager_update_secret_expiration

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