---
title: Python-SDK - 4.1.0
slug: feature-experimentation/release-notes/python-sdk-4-1-0
docTags: 
createdAt: 2026-07-20T15:45:13.274Z
---

## [#410---july-7th-2022](docId\:e80KZ-jGVDDgNjrYmyhiC)\[4.1.0] - July 7th, 2022

### [#bug-fixes](docId\:e80KZ-jGVDDgNjrYmyhiC)Bug Fixes

- Fix invalid datafile returned from `ProjectConfig.to_datafile` and `OptimizelyConfig.get_datafile` ([#321](https://github.com/optimizely/python-sdk/pull/321), [#384](https://github.com/optimizely/python-sdk/pull/384))

[https://github.com/optimizely/python-sdk/releases/tag/4.1.0](https://github.com/optimizely/python-sdk/releases/tag/4.1.0)