class altair.FieldLTPredicate(field=Undefined, lt=Undefined, timeUnit=Undefined, **kwds)

FieldLTPredicate schema wrapper

Mapping(required=[field, lt])


Field to be tested.

ltanyOf(string, float, DateTime, ExprRef)

The value that the field should be less than.

timeUnitanyOf(TimeUnit, TimeUnitParams)

Time unit for the field to be tested.

__init__(field=Undefined, lt=Undefined, timeUnit=Undefined, **kwds)


__init__([field, lt, timeUnit])

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 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