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axel 0.0.3

Python event handling (C# style)

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Axel is a very small Python library inspired by C# events that allows an easy and elegant event handling.

Examples:

from axel import Event

event = Event()
def on_event(*args, **kwargs):
return (args, kwargs)

event += on_event                     #handler registration
print(event(10, 20, y=30))
>> ((True, ((10, 20), {'y': 30}), <function on_event at 0x00BAA270>),)

event -= on_event                     #handler is unregistered
print(event(10, 20, y=30))
>> None


class Mouse(object):
def __init__(self):
self.click = Event(self)
self.click += self.on_click   #handler registration

def on_click(self, sender, *args, **kwargs):
assert isinstance(sender, Mouse), 'Wrong sender'
return (args, kwargs)

mouse = Mouse()
print(mouse.click(10, 20))
>> ((True, ((10, 20), {}),
>>  <bound method Mouse.on_click of <__main__.Mouse object at ...>>),)

mouse.click -= mouse.on_click         #handler is unregistered
print(mouse.click(10, 20))
>> None
Features:
  • handlers can receive the sender as their first argument
  • handlers are always executed in separate threads
  • handlers may be executed synchronous or asynchronous
  • handlers execution may be synchronized on a lock
  • the time allocated for the execution of a handler is controllable
  • the number of actively executed handlers at one time is controllable
  • the execution result of a handler can be memoized
  • the result of the execution is provided as a tuple ((flag, result, handler),)
  • in case of error, the traceback may be provided for each handler in error

Please see the documentation: http://packages.python.org/axel

 
File Type Py Version Uploaded on Size # downloads
axel-0.0.3.zip (md5) Source 2010-06-29 12KB 737