Entities

The policyengine_core.entities module contains the classes that define how entities (and group entities) function.

Entity

class policyengine_core.entities.entity.Entity(key: str, plural: str, label: str, doc: str)

Bases: object

Represents an entity (e.g. a person, a household, etc.) on which calculations can be run.

check_role_validity(role: Any) → None

check_variable_defined_for_entity(variable_name: str) → None

get_variable(variable_name: str, check_existence: bool = False)

set_tax_benefit_system(tax_benefit_system) → None

GroupEntity

class policyengine_core.entities.group_entity.GroupEntity(key: str, plural: str, label: str, doc: str, roles: List[str], containing_entities: List[str] = ())

Bases: Entity

Represents an entity containing several others with different roles.

A GroupEntity represents an Entity containing several other Entity with different Role, and on which calculations can be run.

Parameters:

• key – A key to identify the group entity.

• plural – The key, pluralised.

• label – A summary description.

• doc – A full description.

• roles – The list of Role of the group entity.

• containing_entities – The list of keys of group entities whose members are guaranteed to be a superset of this group’s entities.

Changed in version 35.7.0: Added containing_entities, that allows the defining of group entities which entirely contain other group entities.

Role

class policyengine_core.entities.role.Role(description, entity)

Bases: object

The type of the relation between an entity instance and a group entity instance.

build_entity

policyengine_core.entities.helpers.build_entity(key: str, plural: str, label: str, doc: str = '', roles: List = None, is_person: bool = False, containing_entities: List[str] = ()) → Entity