Re: [Pydispatcher-devel] dispatcher questions

[Mike C. F. <mcf...@ro...>]

Thomas Heller wrote:

>"Mike C. Fletcher" <mcf...@ro...> writes:
>  
>
...

>>class Holder( object ):
>>    def __init__( self, method, client ):
>>       self.method= method # strong reference, kept alive
>>       self.client = saferef.safeRef( client, onDelete = self.cleanup )
>>    
>>
...

>Mike, thanks for this suggestion. It didn't work exactly as shown above,
>but it showed me the way to do it. I assume you meant
>        self.client = weakref.ref(client, self.cleanup)
>instead of
>        self.client = saferef.safeRef( client, onDelete = self.cleanup )
>or did I miss something.
>
Probably that I'm using the latest version of pydispatcher (the package)
from sourceforge.  It splits out the various pieces of functionality
into seperate reusable modules, so that there's a saferef module which
does all the "safe reference to a method" stuff from the dispatcher
module.  That way if the client object is itself a method of an object
it won't just disappear when the function that accessed it exits.

There's also a robustapply module which does all the "figure out which
arguments apply to this callable object and call it with that subset of
the passed arguments" stuff.  The dispatcher module itself also has a
few new convenience functions:

def getAllReceivers( sender = Any, signal = Any ):
    """Get list of all receivers from global tables
def liveReceivers(receivers):
    """Filter sequence of receivers to get resolved, live receivers

def sendExact( signal=Any, sender=Anonymous, *arguments, **named ):
    """Send signal only to those receivers registered for exact message
def getReceivers( sender = Any, signal = Any ):
    """Get list of receivers from global tables

>And sorry for the late reply.
>
No problem, I'm far too busy these days myself.  Glass houses and stones
and all :) .

Have fun,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/