Programming Forums > Script Programming > Python

dognayr15 · Dec 7th, 2007, 6:21 PM

below is my code and whenever i run it it says: "NameError: name 'Ship' is not defined"

class Ship(games.Sprite):
"""The player's ship."""
image = games.load_image("ship.bmp")
ROTATION_STEP = 3

def update(self):
"""Rotates based on keys pressed."""
if games.keyboard.is_pressed(games.K_LEFT):
self.angle -= Ship.ROTATION_STEP
if games.keyboard.is_pressed(games.K_RIGHT):
self.angle += Ship.ROTATION_STEP

the_ship = Ship(image = Ship.image,
x = games.screen.width/2,
y = games.screen.height/2)

games.screen.add(the_ship)

Sane · Dec 7th, 2007, 6:34 PM

Wrap your code in [code][/code] tags.

What line are you getting the error on? You might need to show more source too, as I don't think the error belongs to this class. Everything looks fine, assuming it's indented how I think.

dognayr15 · Dec 7th, 2007, 7:52 PM

class Ship(games.Sprite):
"""The player's ship."""
image = games.load_image("ship.bmp")
ROTATION_STEP = 3

def update(self):
"""Rotates based on keys pressed."""
if games.keyboard.is_pressed(games.K_LEFT):
self.angle -= Ship.ROTATION_STEP
if games.keyboard.is_pressed(games.K_RIGHT):
self.angle += Ship.ROTATION_STEP

the_ship = Ship(image = Ship.image,
x = games.screen.width/2,
y = games.screen.height/2)

games.screen.add(the_ship)

and i am getting the error in the 13th line

Jessehk · Dec 7th, 2007, 9:17 PM

I will repeat Sane and ask that you wrap your code in the appropriate tags to allow for indentation and highlighting. Doing so will help us to help you.

titaniumdecoy · Dec 7th, 2007, 10:46 PM

Clearly the OP didn't read the reply to his original post or he would have known to use code tags in his second post. Why should we waste our time trying to answer a question knowing our responses will be ignored?

dognayr15 · Dec 8th, 2007, 8:03 AM

maybe if i knew how to wrap it then i would

Infinite Recursion · Dec 8th, 2007, 8:16 AM

[ CODE ] your code [ / CODE ] without the spaces in the tags.

dognayr15 · Dec 8th, 2007, 8:36 AM

ty sir

(Toggle Plain Text)

class Ship(games.Sprite):

(Toggle Plain Text)

  (Toggle Plain Text) 
 """The player's ship."""
 """The player's ship."""
 
  (Toggle Plain Text) 
 image = games.load_image("ship.bmp")
 image = games.load_image("ship.bmp")
 
  (Toggle Plain Text) 
 ROTATION_STEP = 3
 ROTATION_STEP = 3
 
  (Toggle Plain Text) 
 def update(self):
 def update(self):
 
  (Toggle Plain Text) 
        """Rotates based on keys pressed."""
        """Rotates based on keys pressed."""
 
  (Toggle Plain Text) 
        if games.keyboard.is_pressed(games.K_LEFT):
        if games.keyboard.is_pressed(games.K_LEFT):
 
  (Toggle Plain Text) 
              self.angle -= Ship.ROTATION_STEP
              self.angle -= Ship.ROTATION_STEP
 
  (Toggle Plain Text) 
        if games.keyboard.is_pressed(games.K_RIGHT):
        if games.keyboard.is_pressed(games.K_RIGHT):
 
  (Toggle Plain Text) 
              self.angle += Ship.ROTATION_STEP
              self.angle += Ship.ROTATION_STEP
 
  (Toggle Plain Text) 
 the_ship = Ship(image = Ship.image,
 the_ship = Ship(image = Ship.image,
 
  (Toggle Plain Text) 
                         x = games.screen.width/2,
                         x = games.screen.width/2,
 
  (Toggle Plain Text) 
                         y = games.screen.height/2)
                         y = games.screen.height/2)
 
  (Toggle Plain Text) 
 games.screen.add(the_ship)
 games.screen.add(the_ship)

now can someone plz help me i am getting a name error on the line that is printed in bold...
the error reads as follows:

"NameError: name 'Ship' is not defined"

Arevos · Dec 8th, 2007, 9:43 AM

Er, you've still got the code tags wrong. Don't encase every line, just the whole block.

I've taken the liberty of doing this for you:

(Toggle Plain Text)

class Ship(games.Sprite):
    """The player's ship."""
    image = games.load_image("ship.bmp")
    ROTATION_STEP = 3

    def update(self):
        """Rotates based on keys pressed."""
        if games.keyboard.is_pressed(games.K_LEFT):
            self.angle -= Ship.ROTATION_STEP
        if games.keyboard.is_pressed(games.K_RIGHT):
            self.angle += Ship.ROTATION_STEP

    the_ship = Ship(image = Ship.image,
                    x = games.screen.width/2,
                    y = games.screen.height/2)

    games.screen.add(the_ship)

And now it's formatted like this, the answer is obvious: you have the indentation wrong. You're trying to instantiate a class before it has been fully defined. You want something more like this:

(Toggle Plain Text)

class Ship(games.Sprite):
    """The player's ship."""
    image = games.load_image("ship.bmp")
    ROTATION_STEP = 3

    def update(self):
        """Rotates based on keys pressed."""
        if games.keyboard.is_pressed(games.K_LEFT):
            self.angle -= Ship.ROTATION_STEP
        if games.keyboard.is_pressed(games.K_RIGHT):
            self.angle += Ship.ROTATION_STEP

the_ship = Ship(image = Ship.image,
                x = games.screen.width/2,
                y = games.screen.height/2)

games.screen.add(the_ship)

Additionally, I'm not sure how the Sprite class works, but I suspect you could do:

(Toggle Plain Text)

class Ship(games.Sprite):
    """The player's ship."""
    ROTATION_STEP = 3

    def __init__(self, x, y):
        image = games.load_image("ship.bmp")
        games.Sprite.__init__(self, image, x, y)

    def update(self):
        """Rotates based on keys pressed."""
        if games.keyboard.is_pressed(games.K_LEFT):
            self.angle -= Ship.ROTATION_STEP
        if games.keyboard.is_pressed(games.K_RIGHT):
            self.angle += Ship.ROTATION_STEP

the_ship = Ship(x = games.screen.width / 2,
                y = games.screen.height / 2)

games.screen.add(the_ship)

dognayr15 · Dec 8th, 2007, 10:02 AM

but i have a problem i have more code that falls under the Ship class and if i unindent the parts u had stated then the code will look like this:

(Toggle Plain Text)

class Ship(Collider):
    """The player's ship."""
    image = games.load_image("ship.bmp")
    ROTATION_STEP = 3

    def update(self):
        """Rotates based on keys pressed."""
        if games.keyboard.is_pressed(games.K_LEFT):
            self.angle -= Ship.ROTATION_STEP
        if games.keyboard.is_pressed(games.K_RIGHT):
            self.angle += Ship.ROTATION_STEP
        super(Ship, self).die()

the_ship = Ship(image = Ship.image,
                x = games.screen.width/2,
                y = games.screen.height/2)

games.screen.add(the_ship)

    import math, random
    VELOCITY_STEP = .03
    sound = games.load_sound("thrust.wav")

    # apply thrust based on up arrow key
    if games.keyboard.is_pressed(games.K_UP):
        Ship.sound.play()

    # change velocity based on ship's angle
    angle = self.angle * math.pi / 180 #convert to radian
    self.dx += Ship.VELOCITY_STEP * math.sin(angle)
    self.dy += Ship.VELOCITY_STEP * -math.cos(angle)

instead of:

(Toggle Plain Text)

class Ship(Collider):
    """The player's ship."""
    image = games.load_image("ship.bmp")
    ROTATION_STEP = 3

    def update(self):
        """Rotates based on keys pressed."""
        if games.keyboard.is_pressed(games.K_LEFT):
            self.angle -= Ship.ROTATION_STEP
        if games.keyboard.is_pressed(games.K_RIGHT):
            self.angle += Ship.ROTATION_STEP
        super(Ship, self).die()

    the_ship = Ship(image = Ship.image,
                    x = games.screen.width/2,
                    y = games.screen.height/2)

    games.screen.add(the_ship)

# Astrocrash 03
# Engages ship's engine

    import math, random
    VELOCITY_STEP = .03
    sound = games.load_sound("thrust.wav")

    # apply thrust based on up arrow key
    if games.keyboard.is_pressed(games.K_UP):
        Ship.sound.play()

    # change velocity based on ship's angle
    angle = self.angle * math.pi / 180 #convert to radian
    self.dx += Ship.VELOCITY_STEP * math.sin(angle)
    self.dy += Ship.VELOCITY_STEP * -math.cos(angle)

will the code still work???

Dec 7th, 2007, 6:21 PM	#1
dognayr15 Newbie Join Date: Dec 2007 Posts: 5 Rep Power: 0	name error below is my code and whenever i run it it says: "NameError: name 'Ship' is not defined" class Ship(games.Sprite): """The player's ship.""" image = games.load_image("ship.bmp") ROTATION_STEP = 3 def update(self): """Rotates based on keys pressed.""" if games.keyboard.is_pressed(games.K_LEFT): self.angle -= Ship.ROTATION_STEP if games.keyboard.is_pressed(games.K_RIGHT): self.angle += Ship.ROTATION_STEP the_ship = Ship(image = Ship.image, x = games.screen.width/2, y = games.screen.height/2) games.screen.add(the_ship)

Dec 7th, 2007, 6:34 PM	#2
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 1,835 Rep Power: 5	Re: name error Wrap your code in [code][/code] tags. What line are you getting the error on? You might need to show more source too, as I don't think the error belongs to this class. Everything looks fine, assuming it's indented how I think.

Dec 7th, 2007, 7:52 PM	#3
dognayr15 Newbie Join Date: Dec 2007 Posts: 5 Rep Power: 0	Re: name error class Ship(games.Sprite): """The player's ship.""" image = games.load_image("ship.bmp") ROTATION_STEP = 3 def update(self): """Rotates based on keys pressed.""" if games.keyboard.is_pressed(games.K_LEFT): self.angle -= Ship.ROTATION_STEP if games.keyboard.is_pressed(games.K_RIGHT): self.angle += Ship.ROTATION_STEP the_ship = Ship(image = Ship.image, x = games.screen.width/2, y = games.screen.height/2) games.screen.add(the_ship) and i am getting the error in the 13th line

Dec 7th, 2007, 9:17 PM	#4
Jessehk The Oblivious One Join Date: May 2005 Location: Ontario, Canada Posts: 641 Rep Power: 4	Re: name error I will repeat Sane and ask that you wrap your code in the appropriate tags to allow for indentation and highlighting. Doing so will help us to help you. __________________ Dr. Zoidberg: [ecstatic] I'm going to a movie... with FRIENDS!

Dec 7th, 2007, 10:46 PM	#5
titaniumdecoy Expert Programmer Join Date: Nov 2005 Posts: 843 Rep Power: 3	Re: name error Clearly the OP didn't read the reply to his original post or he would have known to use code tags in his second post. Why should we waste our time trying to answer a question knowing our responses will be ignored?

Dec 8th, 2007, 8:03 AM	#6
dognayr15 Newbie Join Date: Dec 2007 Posts: 5 Rep Power: 0	Re: name error maybe if i knew how to wrap it then i would

Dec 8th, 2007, 8:16 AM	#7
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	Re: name error [ CODE ] your code [ / CODE ] without the spaces in the tags. __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Dec 8th, 2007, 9:43 AM	#9
Arevos Programming Guru Join Date: Aug 2005 Location: England Posts: 1,499 Rep Power: 5	Re: name error Er, you've still got the code tags wrong. Don't encase every line, just the whole block. I've taken the liberty of doing this for you: (Toggle Plain Text) class Ship(games.Sprite): """The player's ship.""" image = games.load_image("ship.bmp") ROTATION_STEP = 3 def update(self): """Rotates based on keys pressed.""" if games.keyboard.is_pressed(games.K_LEFT): self.angle -= Ship.ROTATION_STEP if games.keyboard.is_pressed(games.K_RIGHT): self.angle += Ship.ROTATION_STEP the_ship = Ship(image = Ship.image, x = games.screen.width/2, y = games.screen.height/2) games.screen.add(the_ship) class Ship(games.Sprite): """The player's ship.""" image = games.load_image("ship.bmp") ROTATION_STEP = 3 def update(self): """Rotates based on keys pressed.""" if games.keyboard.is_pressed(games.K_LEFT): self.angle -= Ship.ROTATION_STEP if games.keyboard.is_pressed(games.K_RIGHT): self.angle += Ship.ROTATION_STEP the_ship = Ship(image = Ship.image, x = games.screen.width/2, y = games.screen.height/2) games.screen.add(the_ship) And now it's formatted like this, the answer is obvious: you have the indentation wrong. You're trying to instantiate a class before it has been fully defined. You want something more like this: (Toggle Plain Text) class Ship(games.Sprite): """The player's ship.""" image = games.load_image("ship.bmp") ROTATION_STEP = 3 def update(self): """Rotates based on keys pressed.""" if games.keyboard.is_pressed(games.K_LEFT): self.angle -= Ship.ROTATION_STEP if games.keyboard.is_pressed(games.K_RIGHT): self.angle += Ship.ROTATION_STEP the_ship = Ship(image = Ship.image, x = games.screen.width/2, y = games.screen.height/2) games.screen.add(the_ship) class Ship(games.Sprite): """The player's ship.""" image = games.load_image("ship.bmp") ROTATION_STEP = 3 def update(self): """Rotates based on keys pressed.""" if games.keyboard.is_pressed(games.K_LEFT): self.angle -= Ship.ROTATION_STEP if games.keyboard.is_pressed(games.K_RIGHT): self.angle += Ship.ROTATION_STEP the_ship = Ship(image = Ship.image, x = games.screen.width/2, y = games.screen.height/2) games.screen.add(the_ship) Additionally, I'm not sure how the Sprite class works, but I suspect you could do: (Toggle Plain Text) class Ship(games.Sprite): """The player's ship.""" ROTATION_STEP = 3 def __init__(self, x, y): image = games.load_image("ship.bmp") games.Sprite.__init__(self, image, x, y) def update(self): """Rotates based on keys pressed.""" if games.keyboard.is_pressed(games.K_LEFT): self.angle -= Ship.ROTATION_STEP if games.keyboard.is_pressed(games.K_RIGHT): self.angle += Ship.ROTATION_STEP the_ship = Ship(x = games.screen.width / 2, y = games.screen.height / 2) games.screen.add(the_ship) class Ship(games.Sprite): """The player's ship.""" ROTATION_STEP = 3 def __init__(self, x, y): image = games.load_image("ship.bmp") games.Sprite.__init__(self, image, x, y) def update(self): """Rotates based on keys pressed.""" if games.keyboard.is_pressed(games.K_LEFT): self.angle -= Ship.ROTATION_STEP if games.keyboard.is_pressed(games.K_RIGHT): self.angle += Ship.ROTATION_STEP the_ship = Ship(x = games.screen.width / 2, y = games.screen.height / 2) games.screen.add(the_ship)

Dec 8th, 2007, 10:02 AM	#10
dognayr15 Newbie Join Date: Dec 2007 Posts: 5 Rep Power: 0	Re: name error but i have a problem i have more code that falls under the Ship class and if i unindent the parts u had stated then the code will look like this: (Toggle Plain Text) class Ship(Collider): """The player's ship.""" image = games.load_image("ship.bmp") ROTATION_STEP = 3 def update(self): """Rotates based on keys pressed.""" if games.keyboard.is_pressed(games.K_LEFT): self.angle -= Ship.ROTATION_STEP if games.keyboard.is_pressed(games.K_RIGHT): self.angle += Ship.ROTATION_STEP super(Ship, self).die() the_ship = Ship(image = Ship.image, x = games.screen.width/2, y = games.screen.height/2) games.screen.add(the_ship) import math, random VELOCITY_STEP = .03 sound = games.load_sound("thrust.wav") # apply thrust based on up arrow key if games.keyboard.is_pressed(games.K_UP): Ship.sound.play() # change velocity based on ship's angle angle = self.angle * math.pi / 180 #convert to radian self.dx += Ship.VELOCITY_STEP * math.sin(angle) self.dy += Ship.VELOCITY_STEP * -math.cos(angle) class Ship(Collider): """The player's ship.""" image = games.load_image("ship.bmp") ROTATION_STEP = 3 def update(self): """Rotates based on keys pressed.""" if games.keyboard.is_pressed(games.K_LEFT): self.angle -= Ship.ROTATION_STEP if games.keyboard.is_pressed(games.K_RIGHT): self.angle += Ship.ROTATION_STEP super(Ship, self).die() the_ship = Ship(image = Ship.image, x = games.screen.width/2, y = games.screen.height/2) games.screen.add(the_ship) import math, random VELOCITY_STEP = .03 sound = games.load_sound("thrust.wav") # apply thrust based on up arrow key if games.keyboard.is_pressed(games.K_UP): Ship.sound.play() # change velocity based on ship's angle angle = self.angle * math.pi / 180 #convert to radian self.dx += Ship.VELOCITY_STEP * math.sin(angle) self.dy += Ship.VELOCITY_STEP * -math.cos(angle) instead of: (Toggle Plain Text) class Ship(Collider): """The player's ship.""" image = games.load_image("ship.bmp") ROTATION_STEP = 3 def update(self): """Rotates based on keys pressed.""" if games.keyboard.is_pressed(games.K_LEFT): self.angle -= Ship.ROTATION_STEP if games.keyboard.is_pressed(games.K_RIGHT): self.angle += Ship.ROTATION_STEP super(Ship, self).die() the_ship = Ship(image = Ship.image, x = games.screen.width/2, y = games.screen.height/2) games.screen.add(the_ship) # Astrocrash 03 # Engages ship's engine import math, random VELOCITY_STEP = .03 sound = games.load_sound("thrust.wav") # apply thrust based on up arrow key if games.keyboard.is_pressed(games.K_UP): Ship.sound.play() # change velocity based on ship's angle angle = self.angle * math.pi / 180 #convert to radian self.dx += Ship.VELOCITY_STEP * math.sin(angle) self.dy += Ship.VELOCITY_STEP * -math.cos(angle) class Ship(Collider): """The player's ship.""" image = games.load_image("ship.bmp") ROTATION_STEP = 3 def update(self): """Rotates based on keys pressed.""" if games.keyboard.is_pressed(games.K_LEFT): self.angle -= Ship.ROTATION_STEP if games.keyboard.is_pressed(games.K_RIGHT): self.angle += Ship.ROTATION_STEP super(Ship, self).die() the_ship = Ship(image = Ship.image, x = games.screen.width/2, y = games.screen.height/2) games.screen.add(the_ship) # Astrocrash 03 # Engages ship's engine import math, random VELOCITY_STEP = .03 sound = games.load_sound("thrust.wav") # apply thrust based on up arrow key if games.keyboard.is_pressed(games.K_UP): Ship.sound.play() # change velocity based on ship's angle angle = self.angle * math.pi / 180 #convert to radian self.dx += Ship.VELOCITY_STEP * math.sin(angle) self.dy += Ship.VELOCITY_STEP * -math.cos(angle) will the code still work???

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Basic Socket Programming Error in Linux.. Pls help	boraciner	C++	18	Sep 12th, 2007 1:17 AM
C# corruption!!!	Kilo	C++	32	May 21st, 2006 8:44 PM
Masm	rsnd	Assembly	4	May 20th, 2006 9:05 PM
libraries	matko	C	1	Jan 22nd, 2006 2:12 PM
String error in if statement	Blighttdm	C	12	Nov 18th, 2005 6:34 PM