---
title: Python-SDK - 5.4.0
slug: feature-experimentation/release-notes/python-sdk-v5-4-0
docTags: 
createdAt: 2026-07-20T15:44:47.637Z
---

## What's Changed

[#whats-changed](docId\:V2gp3mUACQ9cf0EFCDa7n)

- \[FSSDK-11572] Python: Update impression event handling and send notification for global holdout by @esrakartalOpt in [https://github.com/optimizely/python-sdk/pull/469](https://github.com/optimizely/python-sdk/pull/469)
- \[FSSDK-12094] Fix Python holdout implementation which related to FSC failures by @esrakartalOpt in [https://github.com/optimizely/python-sdk/pull/471](https://github.com/optimizely/python-sdk/pull/471)
- \[FSSDK-12094] chore: preparing for release v5.4.0 by @esrakartalOpt in [https://github.com/optimizely/python-sdk/pull/473](https://github.com/optimizely/python-sdk/pull/473)

**Full Changelog**: [https://github.com/optimizely/python-sdk/compare/5.3.0...v5.4.0](https://github.com/optimizely/python-sdk/compare/5.3.0...v5.4.0)

[https://github.com/optimizely/python-sdk/releases/tag/v5.4.0](https://github.com/optimizely/python-sdk/releases/tag/v5.4.0)