---
title: Python-SDK - 3.5.0
slug: feature-experimentation/release-notes/python-sdk-3-5-0
docTags: 
createdAt: 2026-07-20T15:44:24.845Z
---

\## \[3.5.0] - July 9th, 2020

\### New Features:
\* Introduced 2 APIs to interact with feature variables:
\* \`get\_feature\_variable\_json\` allows you to get value for JSON variables related to a feature.
\* \`get\_all\_feature\_variables\` gets values for all variables under a feature.
\* Added support for fetching authenticated datafiles. \`AuthDatafilePollingConfigManager\` is a new config manager that allows you to poll for a datafile belonging to a secure environment. You can create a client by setting the \`datafile\_access\_token\`.

\### Bug Fixes:
\* Fixed log messages for targeted rollouts evaluation. (\[#268]\([https://github.com/optimizely/python-sdk/pull/268](https://github.com/optimizely/python-sdk/pull/268)))

[https://github.com/optimizely/python-sdk/releases/tag/3.5.0](https://github.com/optimizely/python-sdk/releases/tag/3.5.0)