pyee supplies an EventEmitter object similar to the EventEmitter
from Node.js.
In [1]: from pyee import EventEmitter
In [2]: ee = EventEmitter()
In [3]: @ee.on('event')
...: def event_handler():
...: print 'BANG BANG'
...:
In [4]: ee.emit('event')
BANG BANG
In [5]:
Easy-peasy.
sudo pip install pyee
ee.on(event, f=None): Registers the function f to the event name
event. Example:
ee.on('data', some_fxn)
If f is not specified, ee.on returns a function that takes f as a
callback, which allows for decorator styles:
@ee.on('data')
def data_handler(data):
print data
ee.emit(event, *args, **kwargs): Emits the event, calling the attached functions
with *args. For example:
ee.emit('data', '00101001')
This will call data('00101001')' (assuming data is an attached function).
Returns False if no functions are attached to handle the emission (otherwise True).
ee.once(event, f=None): The same as ee.on, except that the listener
is automatically removed after it's called.
ee.remove_listener(event, fxn): Removes the function fxn from event.
Requires that the function is not closed over by ee.on (using this with the
decorator style is unfortunately not possible).
ee.remove_all_listeners(event): Removes all listeners from event.
ee.listeners(event): Returns the array of all listeners registered to
the given event.
"new_listener": Fires whenever a new listener is created. Listeners for this event do not fire upon their own creation.
"error": When emitted raises an Exception by default, behavior can be overriden by attaching callback to the event. For example:
@ee.on('error')
def onError(message):
logging.err(message)
ee.emit('error', Exception('something blew up'))
nosetests
If you're a Python and/or Node.js fan, and you like what you see (or don't quite like what you see): I heartily invite you to dig in, fork it up and git push it good.
MIT.