[py] querychat 0.5.0

New features

• Added support for Gradio, Dash, and Streamlit web frameworks in addition to Shiny. Import from the new submodules:
  • from querychat.gradio import QueryChat
  • from querychat.dash import QueryChat
  • from querychat.streamlit import QueryChat

Each framework's QueryChat provides .app() for quick standalone apps and .ui() for custom layouts. Install framework dependencies with pip extras: pip install querychat[gradio], pip install querychat[dash], or pip install querychat[streamlit]. (#190)

• QueryChat() gains support for more data sources:
  • polars.LazyFrame: queries execute lazily via polars.SQLContext. In this case, .df() et al. methods will return a polars.LazyFrame. (#191)
  • ibis.Table: queries execute lazily via the Ibis backend's SQL interface (DuckDB, PostgreSQL, BigQuery, etc.). In this case, .df() et al. methods will return an ibis.Table. (#193)
  • pyarrow.Table: queries execute in-memory via duckdb. In this case, .df() et al. methods will return a pyarrow.Table. (#196)

Improvements

• Improved typing support for return types on .df() et al. (#196)

Changes

• DataFrameSource methods now (once again) return the input DataFrame type (e.g., pandas.DataFrame) instead of nw.DataFrame. (#196)