ActiveVariable

class osaft.core.variable.ActiveVariable(function_call, name=None)

Bases: BaseActiveVariable

Variables that depended on at least one BaseVariable

Parameters

• function_call (Callable[[], Any]) – function signature that defines how ActiveVariable._value is computed

• name (None | str, optional) – Name of the variable

  Default: None

Public Data Attributes:

value

Returns the value of the attribute.

Inherited from BaseActiveVariable

needs_update

Returns if an update is needed for the next value retrieval

Inherited from BaseVariable

name	Returns name of the variable.
value	Returns the value of the attribute.

Public Methods:

Inherited from BaseActiveVariable

is_computed_by(*variables)

Adds the notification dependencies

Inherited from BaseVariable

notify()

Notifies all items in BaseVariable._variables_to_notify that a dependent value changed.

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is_computed_by(*variables)

Adds the notification dependencies

Parameters

variables (Any) – variables that are referenced in _update()

Raises

TypeError if no arguments are passed

Return type

None

notify()

Notifies all items in BaseVariable._variables_to_notify that a dependent value changed. Just the information of a changed dependency is passed.

Return type

None

property name: str

Returns name of the variable.

Setter

sets _name

Return type

str

property needs_update: bool

Returns if an update is needed for the next value retrieval

Return type

bool

property value: Any

Returns the value of the attribute. If ActiveVariable.needs_update is true, it calls ActiveVariable._update() first and then changes ActiveVariable._needs_update to False before returning the value.

Return type

Any