Streamlit 1.57.0

What's Changed

Breaking Changes 🛠

• [feature] Make Starlette the default server and remove Tornado by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14553
• [chore] Remove deprecated kwargs from plotly_chart and vega_lite_chart by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14800
• [chore] Remove deprecated _get_websocket_headers function by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14801
• [feature] Direct polars to arrow conversion bypassing pandas by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14885

New Features 🎉

• [feature] Hide chevron for menu-style icon labels for st.menu_button and st.popover by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14697
• [feature] Add pills, segmented_control properties and dataframe key to AppTest by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14518
• [feature] Add title parameter to alert elements by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14665
• [feat] Add :shimmer[] markdown directive for animated loading text by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14055
• [feature] Expose App in the st namespace by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14722
• Bundle OSS developing-with-streamlit core skills in pip package by @sfc-gh-nbellante in https://github.com/streamlit/streamlit/pull/14745
• [fix] Add border radius to video and map elements by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14781
• [feature] Add secrets parameter to st.App by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14861
• Add app and theme templates to bundled skills by @sfc-gh-nbellante in https://github.com/streamlit/streamlit/pull/14746
• [feature] Expose st.bottom container by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14726

Bug Fixes 🐛

• [feature] Deduplicate equivalent file extensions in file uploader display by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14552
• [fix] st.dataframe crash with pandas 3 ArrowStringArray by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14611
• fix(caching): chain original exception in UnserializableReturnValueError by @mango766 in https://github.com/streamlit/streamlit/pull/14655
• [fix] inconsistent space encoding in query params by @sfc-gh-lwilby in https://github.com/streamlit/streamlit/pull/14691
• [fix] Preserve None values in st.data_editor with pandas 3.0+ by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14694
• [Fix] Add CSS Color Level 4 support by @mayagbarnes in https://github.com/streamlit/streamlit/pull/14674
• [fix] Evict namespace children when watched sources reload by @sfc-gh-lwilby in https://github.com/streamlit/streamlit/pull/14708
• [fix] Downcast large Arrow types in custom component v1 serialization by @sfc-gh-nbellante in https://github.com/streamlit/streamlit/pull/14617
• [fix] Retain st.radio selection for format_func and custom options by @sfc-gh-lwilby in https://github.com/streamlit/streamlit/pull/14815
• Fix bar_chart axis labels not swapping when horizontal=True by @kmcgrady in https://github.com/streamlit/streamlit/pull/14866
• [fix] st.text_area height='content' sizing on initial load by @lukasmasuch in https://github.com/streamlit/streamlit/pull/14884

Other Changes

• [chore] Update emojis/material icons by @github-actions[bot] in https://github.com/streamlit/streamlit/pull/14576
• [chore] Release v1.56.0 by @github-actions[bot] in https://github.com/streamlit/streamlit/pull/14598
• Docs for dataframe programmatic selections by @MathCatsAnd in https://github.com/streamlit/streamlit/pull/14616
• [chore] Update emojis/material icons by @github-actions[bot] in https://github.com/streamlit/streamlit/pull/14649
• [chore] Update emojis/material icons by @github-actions[bot] in https://github.com/streamlit/streamlit/pull/14752
• [chore] Update emojis/material icons by @github-actions[bot] in https://github.com/streamlit/streamlit/pull/14869
• Docs for audio and video columns by @MathCatsAnd in https://github.com/streamlit/streamlit/pull/14628

New Contributors

• @dagecko made their first contribution in https://github.com/streamlit/streamlit/pull/14554
• @mango766 made their first contribution in https://github.com/streamlit/streamlit/pull/14655
• @sfc-gh-wschmitt made their first contribution in https://github.com/streamlit/streamlit/pull/14922

Full Changelog: https://github.com/streamlit/streamlit/compare/1.56.0...1.57.0