Yeah, just keep a list of functions in your own code, no need to use twisted for it and I've not seen twisted functions that really help. something like:<br><br>class event(object):<br> def __init__(self):<br> self.subscribers=[]<br>
def subscribe(self.f):<br> self.subscribers.append(f)<br> def invoke(self,*args,*kwargs):<br> for function in subscribers:<br> function(*args,**kwargs)<br><br>you can tweak that or whatever, but that's the basic pythonic way to do it in my book(and in my code) a couple options to consider:<br>
* in invoke, pass self to the function, I usually do that so I can have functions that do whatever they do to the "event" subclass itself, as in a clearOnFocus function attached to a text control which subclasses event, whenever certain data is seen (type=focusEvent) clear the control.<br>
* instead of storing functions store and .callback deffereds, of course those can only be used once so change event.subscribe to event.wait for clarity and reinitialize the list after invoke.<br><br>-Andy Fundinger<br><br>
<div class="gmail_quote">On Jan 30, 2008 3:15 PM, Simon Pickles <<a href="mailto:sipickles@hotmail.com">sipickles@hotmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi,<br><br>I have a stackless python app, using twisted in parts (.internet and<br>.adbapi).<br><br>I need a little help getting pythonic after years of c++ hell.<br><br>I'd like to use a system of events and observers, like c++ boost.signal.<br>
<br>I'd like to be able to subscribe multiple callbacks to a single function<br>and cal them all using something like:<br><br>event.invoke("some data to send with invocation")<br><br>I'm thinking twisted callbacks do this:<br>
<br> def observe(self, f);<br> self.event.addcallback(f)<br><br>Are there other ways?<br><br>Thanks<br><br>Si<br><br>--<br>Linux user #458601 - <a href="http://counter.li.org" target="_blank">http://counter.li.org</a>.<br>
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