- Upgrade to 4.2.0:
- Pie charts are now supported through the use of mark_arc.
- Support for the datum encoding specifications from Vega-Lite;
see Vega-Lite Datum Definition.
- angle encoding can now be used to control point styles
- Support for serialising pandas nullable data types for float data
- Automatically create an empty data object when Chart is
called without a data parameter
- Allow the use of pathlib Paths when saving charts
- Support deepcopy for charts
- Fix to_dict() for nested selections
- Fix item access for expressions