Hey all, 
We have some updates regarding Session State. It’s now natively supported in Streamlit via the 0.84.0 release! 
One of the examples in the Session State Demo App is annotating data.
To use, upgrade to the latest version:
pip install --upgrade streamlit
Helpful links:
- Session State Blog Post
- Session State Topic Guide
- Session State API Reference
- Session State Demo App
- Forum release notes
Looking forward to hearing what you think 