Yes, exactly like that.
Well done, you are now callback aware :-)
Alan G.
----- Original Message ----
From: Michael Bernhard Arp Sørensen <[EMAIL PROTECTED]>
To: Alan Gauld <[EMAIL PROTECTED]>
Cc: tutor@python.org
Sent: Wednesday, 2 January, 2008 8:19:23 PM
Subject: Re: [Tutor] Learning about callbaks
Hi.
On Jan 2, 2008 6:36 PM, Alan Gauld <[EMAIL PROTECTED]> wrote:
Can you modify the program *without modifying the classes* to use an
ordinary function as the callback? Say this goodbye function:
def goodbye():
print "goodbye world"
This should not require more than 5 lines of new code and no changes
to the
existing code. It could be done in 3...
Like this?:
class UserInput:
def __init__(self):
pass
def test_callback(self, this_callback):
print "testing the callback"
this_callback()
class Game:
def __init__(self):
self.ui = UserInput()
def hello(self):
print "hello world"
def useUI(self):
self.ui.test_callback(self.hello)
def goodbye():
print "goodbye world"
g = Game()
g.useUI()
g.ui.test_callback(goodbye)
It took me a couple of minutes to understand your challenge. :-) Then I
remembered that "ui" is instantiated inside "g" and therefore callable with the
right parameter.
Thank you very, very much. I enjoy a good challenge.
--
Med venlig hilsen/Kind regards
Michael B. Arp Sørensen
Programmør / BOFH
I am /root and if you see me laughing you better have a backup.
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