[Tutor] FW: robots question

[Roelof Wobben]

From: rwobben at hotmail.com
To: __peter__ at web.de
Subject: RE: [Tutor] robots question
Date: Thu, 16 Sep 2010 17:43:41 +0000








Hello , 

I change everything to this :

#
# robots.py
#
from gasp import *

SCREEN_WIDTH = 640
SCREEN_HEIGHT = 480
GRID_WIDTH = SCREEN_WIDTH/10 - 1
GRID_HEIGHT = SCREEN_HEIGHT/10 - 1


def place_player():
    # x = random.randint(0, GRID_WIDTH)
    # y = random.randint(0, GRID_HEIGHT)
    x, y = GRID_WIDTH/2 + 3, GRID_HEIGHT/2
    return {'shape': Circle((10*x+5, 10*y+5), 5, filled=True), 'x': x, 'y': y}

def place_robot(x,y, junk):
    x = random.randint(0, GRID_WIDTH)
    y = random.randint(0, GRID_HEIGHT)
    return {'shape': Box((10*x, 10*y), 10, 10), 'x': x, 'y': y}


def place_robots(numbots):
    robots = []
    # for i in range(numbots):
    #    x = random.randint(0, GRID_WIDTH)
    #    y = random.randint(0, GRID_HEIGHT)
    #    robots.append(place_robot(x, y))
    robots.append(place_robot(GRID_WIDTH/2 - 4, GRID_HEIGHT/2 + 2, junk= False))
    robots.append(place_robot(GRID_WIDTH/2 - 4, GRID_HEIGHT/2 - 2, junk = False))
    print type(robots)
    return robots

def move_player(player):
    update_when('key_pressed')
    if key_pressed('escape'):
        return True
    elif key_pressed('4'):
        if player['x'] > 0: player['x'] -= 1
    elif key_pressed('7'):
        if player['x'] > 0: player['x'] -= 1
        if player['y'] < GRID_HEIGHT: player['y'] += 1
    elif key_pressed('8'):
        if player['y'] < GRID_HEIGHT: player['y'] += 1
    elif key_pressed('9'):
        if player['x'] < GRID_WIDTH: player['x'] += 1
        if player['y'] < GRID_HEIGHT: player['y'] += 1
    elif key_pressed('6'):
        if player['x'] < GRID_WIDTH: player['x'] += 1
    elif key_pressed('3'):
        if player['x'] < GRID_WIDTH: player['x'] += 1
        if player['y'] > 0: player['y'] -= 1
    elif key_pressed('2'):
        if player['y'] > 0: player['y'] -= 1
    elif key_pressed('1'):
        if player['x'] > 0: player['x'] -= 1
        if player['y'] > 0: player['y'] -= 1
    elif key_pressed('0'):
       player['x'] = random.randint(0, GRID_WIDTH)
       player['y'] = random.randint(0, GRID_HEIGHT)
    else:
        return False

    move_to(player['shape'], (10*player['x']+5, 10*player['y']+5))

    return False

def collided(thing1, thing2):
    return thing1['x'] == thing2['x'] and thing1['y'] == thing2['y']

def check_collisions(robots, junk, player):
    # check whether player has collided with anything
    for thing in robots + junk:
        if collided(thing, player):
            return True
    return False



def move_robot(robot, player):
    if robot['x'] < player['x']: robot['x'] += 1
    elif robot['x'] > player['x']: robot['x'] -= 1

    if robot['y'] < player['y']: robot['y'] += 1
    elif robot['y'] > player['y']: robot['y'] -= 1

    move_to(robot['shape'], (10*robot['x'], 10*robot['y']))

def move_robots(robots, player):
    for robot in robots:
        move_robot(robot, player)


def play_game():
    begin_graphics(SCREEN_WIDTH, SCREEN_HEIGHT)
    player = place_player()
    robot = place_robots(4)
    junk = [ place_robot(GRID_WIDTH/2, GRID_HEIGHT/2, junk="true" )]
    robots = []
    defeated = False

    while not defeated:
        quit =  move_player(player)
        if quit:
            break
        move_robots(robots, player)
        print "type robots", type(robots)
        print "type junk", type(junk)
        print "type player", type(player)
        defeated = check_collisions(robots, player, junk)

    if defeated:
        remove_from_screen(player['shape'])
        for thing in robots + junk:
            remove_from_screen(thing['shape'])
        Text("They got you!", (240, 240), size=32)
        sleep(3)

    end_graphics()



if __name__ == '__main__':
    play_game()


And now Im getting this message :

** Message: pygobject_register_sinkfunc is deprecated (GtkWindow)
** Message: pygobject_register_sinkfunc is deprecated (GtkInvisible)
** Message: pygobject_register_sinkfunc is deprecated (GtkObject)
<type 'list'>
type robotsTraceback (most recent call last):
 <type 'list'>
type junk <type 'list'>
type player <type 'dict'>
  File "/root/workspace/test2/src/test.py", line 125, in <module>
    play_game()
  File "/root/workspace/test2/src/test.py", line 111, in play_game
    defeated = check_collisions(robots, player, junk)
  File "/root/workspace/test2/src/test.py", line 74, in check_collisions
    for thing in robots + junk:
TypeError: can only concatenate list (not "dict") to list

So far I can see the problem is that player is a dict and the rest is a list.

Is this the correct conclusion ?

Roelof


> To: tutor at python.org
> From: __peter__ at web.de
> Date: Thu, 16 Sep 2010 18:10:13 +0200
> Subject: Re: [Tutor] robots question
> 
> Roelof Wobben wrote:
> 
> > As a exercise from this book ( Thinking like a computer scientist ) I have
> > to make this programm on this
> > page(http://openbookproject.net/thinkcs/python/english2e/ch12.html)
> > Exercise 11
> 
> > def check_collisions(robots, junk, player):
> 
> >         defeated = check_collisions(robot, player, junk)
> 
> Just look at the argument names: check_collisions() is probably expecting a 
> /list/ of robots where you are passing it a single one.
> 
> > But now Im getting this error message :
> > 
> > Traceback (most recent call last):
> >   File "/root/workspace/test2/src/test.py", line 120, in <module>
> >     play_game(2)
> >   File "/root/workspace/test2/src/test.py", line 106, in play_game
> >     defeated = check_collisions(robot, player, junk)
> >   File "/root/workspace/test2/src/test.py", line 73, in check_collisions
> >     for thing in robots + junk:
> > TypeError: can only concatenate list (not "dict") to list
> > 
> > I understand that robots is a dict and junk is a list.
> > 
> > Is that right ?
> 
> Yes. You are getting a dict because a single robot's state is stored in a 
> dictionary.
> 
> > And why does the book say that when this message is appearing.
> 
> The way the program is presented makes it hard to tell at what point your 
> and Eckel's idea of the script start to differ without going through the 
> entire chapter.
> 
> Aside: that's why real projects use version control systems. When a program 
> stops working after a change there is always the option to go back to the 
> state of the program before the bug was introduced.
> 
> Peter
> 
> _______________________________________________
> Tutor maillist  -  Tutor at python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor
 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/tutor/attachments/20100916/23624c1c/attachment.html>