altair.ExprOrSignalRef

class altair.ExprOrSignalRef(expr=Undefined, **kwds)

ExprOrSignalRef schema wrapper

Mapping(required=[expr])

Attributes

exprstring

Vega expression (which can refer to Vega-Lite parameters).

__init__(expr=Undefined, **kwds)

Methods

__init__([expr])
copy([deep, ignore])	Return a copy of the object
from_dict(dct[, validate, _wrapper_classes])	Construct class from a dictionary representation
from_json(json_string[, validate])	Instantiate the object from a valid JSON string
resolve_references([schema])	Resolve references in the context of this object's schema or root schema.
to_dict([validate, ignore, context])	Return a dictionary representation of the object
to_json([validate, ignore, context, indent, ...])	Emit the JSON representation for this object as a string.
validate(instance[, schema])	Validate the instance against the class schema in the context of the rootschema.
validate_property(name, value[, schema])	Validate a property against property schema in the context of the rootschema