The error message im getting is:
'AttributeError: 'Spikey_ball' object has no attribute 'handle_caught'.
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 4 Feb 2012 23:43:32 +0000
> From: myles broomes <mylesbroo...@hotmail.co.uk>
> To: <tutor@python.org>
> Subject: [Tutor] Pizza panic game
> Message-ID: <dub102-w52c53a0248d70e73cd099197...@phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
> Im currently using a book called 'Programming in Python for the complete
> beginner' and at the end of each chapter, the reader is given challenges to
> do. The current chapter im on, one of the challenges is to take the source
> code for a 'Pizza Panic' game , and find a way to make the game more
> difficult. Basically, the premise of the game is the player controls a pan
> and has to try and catch falling pizzas that a computer controlled chef is
> dropping, and failure to drop any results in game over. The idea I came up
> with is as well as the chef dropping the pizzas, he also drops hazardous
> spikey balls that the player has to try and avoid. I'll try to explain the
> part that im having trouble with:
>
> Heres the code for the 'Spikey ball' class that creates the spikey ball
> object:
>
> class Spikey_ball(games.Sprite):
> """A hazardous spikey ball that falls to the ground."""
> image = games.load_image("Spikey_ball.png")
> speed = 0.5
>
> def __init__(self, x, y = 90):
> """Initialise the spikey ball object."""
> super(Spikey_ball, self).__init__(image = Spikey_ball.image,
> x = x, y = y,
> dy = Spikey_ball.speed)
> def update(self):
> """Check if botton edge has reached the screen."""
> if self.bottom > games.screen.height:
> self.destroy()
>
> def handle_caught(self):
> """Destroy if caught and end game."""
> if self.bottom > Pan.top:
> Pizza.end_game()
> self.destroy()
>
>
> ...And heres the code for the pan class:
>
> class Pan(games.Sprite):
> """
> A pan controlled by player to catch falling pizzas.
> """
> image = games.load_image("pan.bmp")
>
> def __init__(self):
> """ Initialize Pan object and create Text object for score. """
> super(Pan, self).__init__(image = Pan.image,
> x = games.mouse.x,
> bottom = games.screen.height)
>
> self.score = games.Text(value = 0, size = 25, color = color.black,
> top = 5, right = games.screen.width - 10)
> games.screen.add(self.score)
>
> def update(self):
> """ Move to mouse x position. """
> self.x = games.mouse.x
>
> if self.left < 0:
> self.left = 0
>
> if self.right > games.screen.width:
> self.right = games.screen.width
>
> self.check_catch()
>
> def check_catch(self):
> """ Check if catch pizzas. """
> for pizza in self.overlapping_sprites:
> pizza.handle_caught()
>
> As you can see, when a sprite overlaps the pan object, the handle_caught
> attribute of said object is invoked. But the weird thing is, when a pizza is
> caught, it works fine and the pizza's handle_caught attribute is invoked
> without complaint. However, when a spikey ball is caught, the game comes up
> with an error and claims that the Spikey_ball object has no handle_caught
> attribute, but as you can see, it clearly does. Can anyone explain this to
> me?
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> ------------------------------
>
> Message: 2
> Date: Sun, 05 Feb 2012 00:16:55 +0000
> From: Alan Gauld <alan.ga...@btinternet.com>
> To: tutor@python.org
> Subject: Re: [Tutor] Pizza panic game
> Message-ID: <jgkhpo$siu$1...@dough.gmane.org>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> On 04/02/12 23:43, myles broomes wrote:
>
> > game comes up with an error and claims that the Spikey_ball object has
> > no handle_caught attribute, but as you can see, it clearly does. Can
> > anyone explain this to me?
>
> Please post the entire error message, do not summarize.
> There is often important information in the message.
>
> Meantime can you try adding a print line in your last
> method to check that the attribute(i.e. method) does
> actually exist in the executing code at the point
> of use?
> ie.
>
> def check_catch(self):
> """ Check if catch pizzas. """
> for pizza in self.overlapping_sprites:
> >>>> print (dir(pizza)) #<<< new line
> pizza.handle_caught()
>
> hth,
> --
> Alan G
> Author of the Learn to Program web site
> http://www.alan-g.me.uk/
>
>
>
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