Package name: maslosoft_signals

Introduction

The package is port of PHP package Maslosoft Signals to Python.

Instead of using custom, vintage annotations processor, the package uses standard Python decorators.

Installation

pip install maslosoft-signals

Usage

from maslosoft.signals import Signal, SignalFor, SlotFor

@SlotFor("my_app.signals.UserRegistered")
class SendWelcomeEmail:
    def __init__(self, signal):
        signal.sent = True

@SignalFor("my_app.slots.GatherSlot")
class GatherableModel:
    pass

signals = Signal(paths=["src"])
signals.build()

# Emit a signal to all matching slots.
result = signals.emit(signal)

# Gather signal classes for a slot.
result = signals.gather(slot)

Current scope

The initial Python port supports:

• SignalFor on classes
• SlotFor on classes for constructor injection
• SlotFor on methods for method injection
• AST scanning of Python source files
• generation of signals_definition.py
• runtime loading through Signal.build(), Signal.emit(), and Signal.gather()

This first slice does not port PHP-style property injection.