lazysignals._signals

Classes

Updated	A singleton to track the events that have been updated.
Dependent	A singleton to track the signals that have been accessed while executing an effect.
Effect	A container to hold an effect function.
Signal	A container to hold a reactive value.

Functions

effect(fn)	Run fn() whenever (relevant) state changes.
derived(fn)	Define a new signal whose value is computed by fn().

Module Contents

class Updated

A singleton to track the events that have been updated.

_signals

_updated

enter(signal)

leave(signal)

submit(updated)

class Dependent

A singleton to track the signals that have been accessed while executing an effect.

_effects = []

property is_set

get(dependency)

enter(effect)

leave()

class Effect(fn)

A container to hold an effect function.

_dependencies

_fn

add_dependency(dependency)

update()

class Signal(value=None)

A container to hold a reactive value.

_value = None

_dependents = []

__str__()

get a reactive string representation of the contained value

__repr__()

get a (nonreactive) string representation of the container

property value

Getter:

gets the current value, registering the current effect as a dependent

Setter:

sets the current value, notifying all dependent effects if it changed

effect(fn)

Run fn() whenever (relevant) state changes.

Parameters:

fn – The function to run on state changes.

Returns:

The return value of fn().

Tip

Use as a function decorator.

derived(fn)

Define a new signal whose value is computed by fn().

Parameters:

fn – A function to compute the value from.

Returns:

A new Signal.

Tip

Use as a function decorator.