delegate-events 0.0.2

Python implementation of the Event Pattern

delegate-events: Python implementation of the Event Pattern.

delegate-events provides a basic implementation of the well-known Event or Pub/Sub Pattern, and is built on top of the delegate-pattern package which handles the delegation part.

Example

from delegate.pattern import delegate
from delegate.events import Channel, Event

class OnSomethingEvent(Event):
    def __init__(self, what: str, why: str):
        self.what = what
        self.why = why

    def __str__(self):
        return f"{self.what} happened because of {self.why}"

class Class1:
    on_something = delegate(Channel[OnSomethingEvent])

inst = Class1()
msg_queue: list[Event] = []

def fn(publisher, event: OnSomethingEvent):
    msg_queue.append(event)

inst.on_something.subscribe(fn)
inst.on_something.fire(OnSomethingEvent("Something", "some other thing"))

str(msg_queue[0]) # => "Something happened because of some other thing"

Full documentation

Go to documentation