Reflex

Reflex is an event system for applications made using Python.

The package provides a way for applications to manage events and event listeners, with little effort.

While the system is somewhat more complex than existing event systems, I feel it is more flexible, and more powerful.

Below is an example that hints at the capabilites of Reflex:

from reflex.data import Event
from reflex.control import EventManager
from reflex.interfaces import Reactor

class example(Reactor):

    name = 'example'

    def __inst__(self):
        self.bind(self.handler, 'basic', source='main')
        self.bind(self.use_args, 'args')

    def handler(self, event, *args):
        print("Hello, world!")

    def use_args(self, event, *args):
        print("Event triggered by {0} since because {1}.".format(event.source, args[0]))

events = EventManager()
obj = example(events)

# The following event trigger is not handled by anything.
events.trigger(Event('basic'))
# The next event trigger is handled by the handler method.
events.trigger(Event('basic', [('source', 'main')]))
# This one is yes.
events.trigger(Event('args', [('source', 'main')]), 'pickles')

Documentation and a package reference can be found at http://photofroggy.github.com/Reflex/index.html

The purpose of this package is to make creating an event driven plugin system for your application an effortless task. A full plugin system can created in just a few lines, as shown here:

from reflex.data import Event
from reflex.control import EventManager
from reflex.control import ReactorBattery
import plugins

# Create an event manager.
events = EventManager()

# Create a battery.
battery = ReactorBattery()
# Load our plugins.
battery.load_objects(events, plugins, 'Plugin')

# Plugins can now be accessed as such:
#   battery.loaded[plugin_name]
# Events can be fired as follows:
#   events.trigger(Event('my event'))
# Easy as pie!

The above example assumes your plugins are stored in a package called plugins.