altair.DatumDef =============== .. currentmodule:: altair .. autoclass:: DatumDef .. automethod:: __init__ .. rubric:: Methods .. autosummary:: ~DatumDef.__init__ ~DatumDef.copy ~DatumDef.from_dict ~DatumDef.from_json ~DatumDef.resolve_references ~DatumDef.to_dict ~DatumDef.to_json ~DatumDef.validate ~DatumDef.validate_property