This website is for version 5. You can find the documentation for version 4 here.


class altair.FoldTransform(fold=Undefined, **kwds)#

FoldTransform schema wrapper

foldSequence[str, FieldName]

An array of data fields indicating the properties to fold.

asSequence[str, FieldName]

The output field names for the key and value properties produced by the fold transform. Default value: ["key", "value"]

__init__(fold=Undefined, **kwds)#



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, indent, sort_keys, ...])

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