chore: librarian release pull request: 20260202T123858Z

[chandra-siri]

PR created by the Librarian CLI to initialize a release. Merging this PR will auto trigger a release.

Librarian Version: v1.0.2-0.20251119154421-36c3e21ad3ac
Language Image: us-central1-docker.pkg.dev/cloud-sdk-librarian-prod/images-prod/python-librarian-generator@sha256:8e2c32496077054105bd06c54a59d6a6694287bc053588e24debe6da6920ad91

google-cloud-storage: 3.9.0

3.9.0 (2026-02-02)

Features

• update generation for MRD (feat: update generation for MRD #1730) (08bc7082)

• add get_object method for async grpc client (feat: add get_object method for async grpc client #1735) (0e5ec29b)

• Add micro-benchmarks for reads comparing standard (regional) vs rapid (zonal) buckets. (feat: Add micro-benchmarks for reads comparing standard (regional) vs rapid (zonal) buckets. #1697) (1917649f)

• Add support for opening via write_handle and fix write_handle type (feat: Add support for opening via write_handle and fix write_handle type #1715) (2bc15fa5)

• add samples for appendable objects writes and reads (2e1a1eb5)

• add samples for appendable objects writes and reads (feat(samples): add samples for appendable objects writes and reads #1705) (2e1a1eb5)

• add context manager to mrd (feat: add context manager to mrd #1724) (5ac2808a)

• Move Zonal Buckets features of _experimental (feat: Move Zonal Buckets features of _experimental #1728) (74c9ecc5)

• add default user agent for grpc (feat: add default user agent for grpc #1726) (7b319469)

• expose finalized_time in blob.py applicable for GET_OBJECT in ZB (feat: expose finalized_time in blob.py applicable for GET_OBJECT in ZB #1719) (8e21a7fe)

• expose DELETE_OBJECT in AsyncGrpcClient (feat: expose DELETE_OBJECT in AsyncGrpcClient #1718) (c8dd7a0b)

• send user_agent to grpc channel (feat(grpc_user_agent): send user_agent to grpc channel #1712) (cdb2486b)

• integrate writes strategy and appendable object writer (feat(experimental): integrate writes strategy and appendable object writer #1695) (dbd162b3)

• Add micro-benchmarks for writes comparing standard (regional) vs rapid (zonal) buckets. (feat: Add micro-benchmarks for writes comparing standard (regional) vs rapid (zonal) buckets. #1707) (dbe9d8b8)

• add support for generation=0 to avoid overwriting existing objects and add is_stream_open support (feat(ZonalBuckets): add support for generation=0 to avoid overwriting existing objects and add is_stream_open support  #1709) (ea0f5bf8)

• add support for generation=0 to prevent overwriting existing objects (ea0f5bf8)

• add is_stream_open property to AsyncAppendableObjectWriter for stream status check (ea0f5bf8)

Bug Fixes

• receive eof while closing reads stream (fix: receive eof while closing reads stream #1733) (2ef63396)

• update write handle on every recv() (fix: update write handle on every recv() #1716) (5d9fafe1)

• implement requests_done method to signal end of requests in async streams. Gracefully close streams. (fix(experimental): implement requests_done method to signal end of requests in async streams. Gracefully close streams. #1700) (6c160794)

• implement requests_done method to signal end of requests in async streams. Gracefully close streams. (6c160794)

• instance grpc client once per process in benchmarks (fix: instance grpc client once per process in benchmarks #1725) (721ea2dd)

• Fix formatting in setup.py dependencies list (fix: Fix formatting in setup.py dependencies list #1713) (cc4831d7)

• Change contructors of MRD and AAOW AsyncGrpcClient.grpc_client to AsyncGrpcClient (fix!: Change contructors of MRD and AAOW AsyncGrpcClient.grpc_client to AsyncGrpcClient #1727) (e730bf50)

[gemini-code-assist]

Summary of Changes

Hello @chandra-siri, 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 automates the release process for the google-cloud-storage library, advancing its version to 4.0.0. The update brings a suite of new functionalities, particularly enhancing asynchronous operations and Zonal Buckets support, alongside crucial bug fixes to improve stability and performance.

Highlights

• Version Update: The google-cloud-storage library has been updated to version 4.0.0.
• New Features: This release introduces significant features including new get_object and DELETE_OBJECT methods for the async gRPC client, enhancements for Zonal Buckets (moving features out of experimental), improved handling for appendable objects with new samples, and better user agent integration for gRPC.
• Bug Fixes: Several issues have been addressed, such as graceful closing of async read streams, correct handling of write handles, and optimizing gRPC client instantiation in benchmarks.

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[gemini-code-assist]

Code Review

This pull request prepares for the 4.0.0 release by updating the version number across several files and adding the new changelog entry. My review focuses on the new changelog, where I've identified and suggested fixes for a few duplicate entries to improve its clarity and conciseness. The rest of the changes look good for a release.

[chandra-siri]

/gemini review

[gemini-code-assist]

Code Review

This pull request appears to be an automated release for version 3.9.0. The changes primarily consist of version bumps and an updated changelog. I've reviewed the changelog and found a few areas for improvement to enhance its clarity and correctness, mainly related to duplicate and redundant entries. Please see my specific comments for details.

[gemini-code-assist]

There are extra spaces after DELETE_OBJECT which affect formatting. Please remove them.

Suggested change

	* expose `DELETE_OBJECT` in `AsyncGrpcClient` (#1718) ([c8dd7a0b124c395b7b60189ee78f47aba8d51f7d](https://github.com/googleapis/python-storage/commit/c8dd7a0b124c395b7b60189ee78f47aba8d51f7d))
	* expose `DELETE_OBJECT` in `AsyncGrpcClient` (#1718) ([c8dd7a0b124c395b7b60189ee78f47aba8d51f7d](https://github.com/googleapis/python-storage/commit/c8dd7a0b124c395b7b60189ee78f47aba8d51f7d))