lazysignals

A library that allows you to run effects whenever state changes. It employs dependency discovery and updates are lazy.

Submodules

• lazysignals._signals
• lazysignals._utils

Classes

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().

Package Contents

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.