Event-driven framework (other than Twisted)?

[Phillip B Oldham]

Are there any python event driven frameworks other than twisted?

[Lie Ryan]

Re: Event-driven framework (other than Twisted)?

On Wed, 01 Oct 2008 01:01:41 -0700, Phillip B Oldham wrote:

Are there any python event driven frameworks other than twisted?

Most GUI package use event-driven model (e.g. Tkinter).

[Phillip B Oldham]

Re: Event-driven framework (other than Twisted)?

On Oct 1, 9:25 am, Lie Ryan <lie.1...@gmail .comwrote:

Most GUI package use event-driven model (e.g. Tkinter).

I've noticed that. I'm thinking more for a web environment (instead of
MVC) or as a HTTP server. I know Twisted has TwistedWeb, but I'm
looking for alternatives.

[Thomas Guettler]

Re: Event-driven framework (other than Twisted)?

Phillip B Oldham schrieb:

On Oct 1, 9:25 am, Lie Ryan <lie.1...@gmail .comwrote:

>Most GUI package use event-driven model (e.g. Tkinter).

>
I've noticed that. I'm thinking more for a web environment (instead of
MVC) or as a HTTP server. I know Twisted has TwistedWeb, but I'm
looking for alternatives.

Please explain what you want to do. Maybe the spread toolkit
can help you:

http://www.spread.org/index.html

HTH,
Thomas


--
Thomas Guettler, http://www.thomas-guettler.de/
E-Mail: guettli (*) thomas-guettler + de

[Phillip B Oldham]

Re: Event-driven framework (other than Twisted)?

On Oct 1, 4:12 pm, Thomas Guettler <h...@tbz-pariv.dewrote:

Please explain what you want to do.

I'm primarily looking for alternatives to MVC frameworks for web
development, particularly SAAS. I've looked around, and some
whitepapers suggest that event-based frameworks often perform better
than MVC. Since I'm looking at SAAS, having a "view" is pretty
pointless since I'll either be using Thrift, returning simple HTTP
headers, or returning some sort of JSON/YAML/XML content (possibly
based on accept headers).

[Bruno Desthuilliers]

Re: Event-driven framework (other than Twisted)?

Phillip B Oldham a écrit :

On Oct 1, 4:12 pm, Thomas Guettler <h...@tbz-pariv.dewrote:

>Please explain what you want to do.

>
I'm primarily looking for alternatives to MVC frameworks for web
development, particularly SAAS. I've looked around, and some
whitepapers suggest that event-based frameworks often perform better
than MVC. Since I'm looking at SAAS, having a "view" is pretty
pointless since I'll either be using Thrift, returning simple HTTP
headers, or returning some sort of JSON/YAML/XML content (possibly
based on accept headers).

"view" doesn't imply (x)html - any valid HTTP response is ok. The whole
point of decoupling controler from view (in web MVC) is to allow the
same controler to return different views.

[Lie Ryan]

Re: Event-driven framework (other than Twisted)?

On Wed, 01 Oct 2008 18:09:20 +0200, Bruno Desthuilliers wrote:

Phillip B Oldham a écrit :

>On Oct 1, 4:12 pm, Thomas Guettler <h...@tbz-pariv.dewrote:

>>Please explain what you want to do.

>>
>I'm primarily looking for alternatives to MVC frameworks for web
>development, particularly SAAS. I've looked around, and some
>whitepapers suggest that event-based frameworks often perform better
>than MVC. Since I'm looking at SAAS, having a "view" is pretty
>pointless since I'll either be using Thrift, returning simple HTTP
>headers, or returning some sort of JSON/YAML/XML content (possibly
>based on accept headers).

>
"view" doesn't imply (x)html - any valid HTTP response is ok. The whole
point of decoupling controler from view (in web MVC) is to allow the
same controler to return different views.

In fact, MVC and event-driven is two entirely different concept. You can
have both, or none. It is, in the end, your choice which one to use or
whether you want to use both or none.

Event-driven programming is a concept that your programs are entirely
composed of function definition and binding that function definition to
events. The rest is handled by a mainloop, which calls the appropriate
functions when it receives something.

MVC is a separation of concern. In MVC code you want that there is a
clear boundary between code that handles Model, View, and Controller, so
it'd be easier to manage the code.

[John Krukoff]

Re: Event-driven framework (other than Twisted)?

You could take a look at this interesting looking server that popped up
on the mailing list a while back:

http://code.google.com/p/yield/

On Wed, 2008-10-01 at 01:01 -0700, Phillip B Oldham wrote:

Are there any python event driven frameworks other than twisted?
--
http://mail.python.org/mailman/listinfo/python-list

--
John Krukoff <jkrukoff@ltgc. com>
Land Title Guarantee Company

[Phillip B Oldham]

Re: Event-driven framework (other than Twisted)?

On Oct 1, 6:53 pm, Lie Ryan <lie.1...@gmail .comwrote:

In fact, MVC and event-driven is two entirely different concept. You can
have both, or none. It is, in the end, your choice which one to use or
whether you want to use both or none.
>
Event-driven programming is a concept that your programs are entirely
composed of function definition and binding that function definition to
events. The rest is handled by a mainloop, which calls the appropriate
functions when it receives something.
>
MVC is a separation of concern. In MVC code you want that there is a
clear boundary between code that handles Model, View, and Controller, so
it'd be easier to manage the code.

So are there any other patterns that can be used in stead of MVC?

[James Mills]

Re: Event-driven framework (other than Twisted)?

On Wed, Oct 1, 2008 at 6:01 PM, Phillip B Oldham
<phillip.oldham @gmail.comwrote :

Are there any python event driven frameworks other than twisted?

Phillip, I have been developing a rather unique
event-driven and component architecture library
for quite some time that is (not twisted). Actually
it's nothing like twisted, but based on 2 core
concepts:
* Everything is a Component
* Everything is an Event

It's currently called pymills.event
Let me know if you're interested, I probably
plan to re-package and re-branch this library
(the event library) at some point.

Here's a small snippet showing off some of
pymills.event's features:

<code>
#!/usr/bin/env python
# -*- coding: utf-8 -*- # vim: set sw=3 sts=3 ts=3

from pymills import event
from pymills.event import *

class TodoList(Compon ent):

todos = {}

def add(self, name, description):
assert name not in self.todos, "To-do already in list"
self.todos[name] = description
self.push(Event (name, description), "added")

class TodoPrinter(Com ponent):

@listener("adde d")
def onADDED(self, name, description):
print "TODO: %s" % name
print " %s" % description

def main():
event.manager += TodoPrinter()
todo = TodoList()
event.manager += todo

todo.add("Make coffee", "Really need to make some coffee")
todo.add("Bug triage", "Double-check that all known issues were addressed")

for value in manager:
print value

if __name__ == "__main__":
main()
</code>

This example is based on a similar example provided
by the Trac project (which was also to show of it's
Component architecture).

Thanks,

cheers
James

--
--
-- "Problems are solved by method"

[James Mills]

Re: Event-driven framework (other than Twisted)?

On Wed, Oct 1, 2008 at 6:55 PM, Phillip B Oldham
<phillip.oldham @gmail.comwrote :

I've noticed that. I'm thinking more for a web environment (instead of
MVC) or as a HTTP server. I know Twisted has TwistedWeb, but I'm
looking for alternatives.

Again with pymills, here's an alternative:

http://hg.shortcircuit.net.au/index.wsgi/pymills/file/b7498cd4c6a4/examples/webtest/hellopymills.py

I have built 2 commercial web applications using my
pymills library and it's web server components (see
simple example above).

NB: I do not plan to write yet another framework :) but instead a set
of re-usable and flexible components.

cheers
James

--
--
-- "Problems are solved by method"

[James Mills]

Re: Event-driven framework (other than Twisted)?

On Thu, Oct 2, 2008 at 2:09 AM, Bruno Desthuilliers
<bruno.42.desth uilliers@websit eburo.invalidwr ote:

"view" doesn't imply (x)html - any valid HTTP response is ok. The whole
point of decoupling controler from view (in web MVC) is to allow the same
controler to return different views.

There is an alternative to the MVC architecture, and that is to have a
set of Resources that are used by any User Interface, be on the Web,
Desktop or Console, as long as it understands HTTP (but it doesn't
have to restrict itself to the HTTP transport).

Normally the applications I build don't use your typical MVC model
or any MVC framework (as mentioned earlier, I've used pymills). I take
the CRUX/RESTful approach and build a set of resources for my
application and SaaS. Then I build a User Interface (normally I use ExtJS)j.

cheers
James

--
--
-- "Problems are solved by method"

[Phillip B Oldham]

Re: Event-driven framework (other than Twisted)?

On Oct 2, 1:32 am, "James Mills" <prolo...@short circuit.net.auw rote:

http://hg.shortcircuit.net.au/index....7498cd4c6a4/ex...

Thanks for the example, but its not loading.

[Phillip B Oldham]

Re: Event-driven framework (other than Twisted)?

On Oct 2, 1:28 am, "James Mills" <prolo...@short circuit.net.auw rote:

Phillip, I have been developing a rather unique
event-driven and component architecture library
for quite some time that is (not twisted). Actually
it's nothing like twisted, but based on 2 core
concepts:
 * Everything is a Component
 * Everything is an Event
>
It's currently called pymills.event
Let me know if you're interested, I probably
plan to re-package and re-branch this library
(the event library) at some point.

I'd be very interested in seeing this. Component-based programming is
something which interests me also.

[James Mills]

Re: Event-driven framework (other than Twisted)?

On 10/2/08, Phillip B Oldham <phillip.oldham @gmail.comwrote :

On Oct 2, 1:28 am, "James Mills" <prolo...@short circuit.net.auw rote:

Phillip, I have been developing a rather unique
event-driven and component architecture library
for quite some time that is (not twisted). Actually
it's nothing like twisted, but based on 2 core
concepts:
* Everything is a Component
* Everything is an Event
>
It's currently called pymills.event
Let me know if you're interested, I probably
plan to re-package and re-branch this library
(the event library) at some point.

>
>
I'd be very interested in seeing this. Component-based programming is
something which interests me also.

Phillip, you can normally clone my library using
Mercurial by doing:

$ hg clone http://hg.shortcircuit.net.au/pymills/

If my VPS is still down, email me and I'll send you
a tar.bz2 (or something).

It may also interest you to know that I've ported
my library to py3k and so far all tests are working :)

Thanks,

cheers
James

--
--
-- "Problems are solved by method"