Bug using pygame where my sprite won't appear on screen

I'm at the very beginning of a chess program and want to print the board on the screen. However, I am having trouble at the first hurdle and cannot even get it to print the squares of the board. It just comes up with a black screen and doesn't put the sprite on it.

I've tried looking at some code from a previous project where it worked, but I can't find any differences in this part of the program.

import pygame

import os

import time



pygame.init()



WHITE = (0, 30, 0)

BLACK = (200, 200, 200)

screen_width = 1400

screen_height = 800

square_size = screen_height/10

screen = pygame.display.set_mode([screen_width, screen_height])

os.environ['SDL_VIDEO_WINDOWS_POS'] = '10,10'





class square(pygame.sprite.Sprite):

    def __init__(self, colour, x, y):

        super().__init__()

        self.image = pygame.Surface([square_size, square_size])

        pygame.draw.rect(self.image, colour, [0, 0, square_size, square_size])

        self.colour = colour

        self.rect = self.image.get_rect()





squares = pygame.sprite.Group()

s = square(WHITE, 20, 20)

squares.add(s)

squares.draw(screen)

time.sleep(3)

I would expect this to output one white square in the top left hand corner of the screen, but only a black screen appears.

asked Dec 27 '18 at 16:33

Arkleseisure

New contributor

add a comment |

I've tried looking at some code from a previous project where it worked, but I can't find any differences in this part of the program.

import pygame

import os

import time



pygame.init()



WHITE = (0, 30, 0)

BLACK = (200, 200, 200)

screen_width = 1400

screen_height = 800

square_size = screen_height/10

screen = pygame.display.set_mode([screen_width, screen_height])

os.environ['SDL_VIDEO_WINDOWS_POS'] = '10,10'





class square(pygame.sprite.Sprite):

    def __init__(self, colour, x, y):

        super().__init__()

        self.image = pygame.Surface([square_size, square_size])

        pygame.draw.rect(self.image, colour, [0, 0, square_size, square_size])

        self.colour = colour

        self.rect = self.image.get_rect()





squares = pygame.sprite.Group()

s = square(WHITE, 20, 20)

squares.add(s)

squares.draw(screen)

time.sleep(3)

I would expect this to output one white square in the top left hand corner of the screen, but only a black screen appears.

asked Dec 27 '18 at 16:33

Arkleseisure

New contributor

add a comment |

I've tried looking at some code from a previous project where it worked, but I can't find any differences in this part of the program.

import pygame

import os

import time



pygame.init()



WHITE = (0, 30, 0)

BLACK = (200, 200, 200)

screen_width = 1400

screen_height = 800

square_size = screen_height/10

screen = pygame.display.set_mode([screen_width, screen_height])

os.environ['SDL_VIDEO_WINDOWS_POS'] = '10,10'





class square(pygame.sprite.Sprite):

    def __init__(self, colour, x, y):

        super().__init__()

        self.image = pygame.Surface([square_size, square_size])

        pygame.draw.rect(self.image, colour, [0, 0, square_size, square_size])

        self.colour = colour

        self.rect = self.image.get_rect()





squares = pygame.sprite.Group()

s = square(WHITE, 20, 20)

squares.add(s)

squares.draw(screen)

time.sleep(3)

I would expect this to output one white square in the top left hand corner of the screen, but only a black screen appears.

asked Dec 27 '18 at 16:33

Arkleseisure

New contributor

I've tried looking at some code from a previous project where it worked, but I can't find any differences in this part of the program.

import pygame

import os

import time



pygame.init()



WHITE = (0, 30, 0)

BLACK = (200, 200, 200)

screen_width = 1400

screen_height = 800

square_size = screen_height/10

screen = pygame.display.set_mode([screen_width, screen_height])

os.environ['SDL_VIDEO_WINDOWS_POS'] = '10,10'





class square(pygame.sprite.Sprite):

    def __init__(self, colour, x, y):

        super().__init__()

        self.image = pygame.Surface([square_size, square_size])

        pygame.draw.rect(self.image, colour, [0, 0, square_size, square_size])

        self.colour = colour

        self.rect = self.image.get_rect()





squares = pygame.sprite.Group()

s = square(WHITE, 20, 20)

squares.add(s)

squares.draw(screen)

time.sleep(3)

I would expect this to output one white square in the top left hand corner of the screen, but only a black screen appears.

python pygame

asked Dec 27 '18 at 16:33

Arkleseisure

New contributor

asked Dec 27 '18 at 16:33

Arkleseisure

New contributor

asked Dec 27 '18 at 16:33

Arkleseisure

New contributor

asked Dec 27 '18 at 16:33

Arkleseisure

asked Dec 27 '18 at 16:33

Arkleseisure

New contributor

Arkleseisure is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment |

2 Answers
2

active

oldest

votes

You need an event.get loop, and to update your display using pygame.display.update() after the squares.draw(screen):

import pygame

import os

import time



pygame.init()



WHITE = (0, 30, 0)

BLACK = (200, 200, 200)

screen_width = 1400

screen_height = 800

square_size = screen_height/10

screen = pygame.display.set_mode([screen_width, screen_height])

os.environ['SDL_VIDEO_WINDOWS_POS'] = '10,10'





class square(pygame.sprite.Sprite):

    def __init__(self, colour, x, y):

        super().__init__()

        self.image = pygame.Surface([square_size, square_size])

        pygame.draw.rect(self.image, colour, [0, 0, square_size, square_size])

        self.colour = colour

        self.rect = self.image.get_rect()



for event in pygame.event.get():

    pass



squares = pygame.sprite.Group()

s = square(WHITE, 20, 20)

squares.add(s)

squares.draw(screen)

pygame.display.update()

time.sleep(3)

Also note, an RGB value of (0, 30, 0) is not white, it's a dark green, if you want bright white try (255, 255, 255).

edited Dec 27 '18 at 16:57

Pedro Gaspar

541321

answered Dec 27 '18 at 16:41

Eli Rockenbeck

263

New contributor

1

Thanks, I think I got my white and black the wrong way round.
– Arkleseisure
Dec 27 '18 at 17:11

1

Didn't want completely white or completely black either, so that it would look chessboardy
– Arkleseisure
Dec 27 '18 at 20:20

Ah yeah that makes sense, if you want I have a pretty easy to use massive color library :)
– Eli Rockenbeck
Dec 29 '18 at 0:32

1

Thanks for the offer, but I'm fine with the one I've got atm :).
– Arkleseisure
Dec 29 '18 at 11:46

add a comment |

Most likely, your problem is that you didn't flip/update the screen.

answered Dec 27 '18 at 16:39

Lie Ryan

44.4k968121

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

You need an event.get loop, and to update your display using pygame.display.update() after the squares.draw(screen):

import pygame

import os

import time



pygame.init()



WHITE = (0, 30, 0)

BLACK = (200, 200, 200)

screen_width = 1400

screen_height = 800

square_size = screen_height/10

screen = pygame.display.set_mode([screen_width, screen_height])

os.environ['SDL_VIDEO_WINDOWS_POS'] = '10,10'





class square(pygame.sprite.Sprite):

    def __init__(self, colour, x, y):

        super().__init__()

        self.image = pygame.Surface([square_size, square_size])

        pygame.draw.rect(self.image, colour, [0, 0, square_size, square_size])

        self.colour = colour

        self.rect = self.image.get_rect()



for event in pygame.event.get():

    pass



squares = pygame.sprite.Group()

s = square(WHITE, 20, 20)

squares.add(s)

squares.draw(screen)

pygame.display.update()

time.sleep(3)

Also note, an RGB value of (0, 30, 0) is not white, it's a dark green, if you want bright white try (255, 255, 255).

edited Dec 27 '18 at 16:57

Pedro Gaspar

541321

answered Dec 27 '18 at 16:41

Eli Rockenbeck

263

New contributor

1

Thanks, I think I got my white and black the wrong way round.
– Arkleseisure
Dec 27 '18 at 17:11

1

Didn't want completely white or completely black either, so that it would look chessboardy
– Arkleseisure
Dec 27 '18 at 20:20

Ah yeah that makes sense, if you want I have a pretty easy to use massive color library :)
– Eli Rockenbeck
Dec 29 '18 at 0:32

1

Thanks for the offer, but I'm fine with the one I've got atm :).
– Arkleseisure
Dec 29 '18 at 11:46

add a comment |

You need an event.get loop, and to update your display using pygame.display.update() after the squares.draw(screen):

import pygame

import os

import time



pygame.init()



WHITE = (0, 30, 0)

BLACK = (200, 200, 200)

screen_width = 1400

screen_height = 800

square_size = screen_height/10

screen = pygame.display.set_mode([screen_width, screen_height])

os.environ['SDL_VIDEO_WINDOWS_POS'] = '10,10'





class square(pygame.sprite.Sprite):

    def __init__(self, colour, x, y):

        super().__init__()

        self.image = pygame.Surface([square_size, square_size])

        pygame.draw.rect(self.image, colour, [0, 0, square_size, square_size])

        self.colour = colour

        self.rect = self.image.get_rect()



for event in pygame.event.get():

    pass



squares = pygame.sprite.Group()

s = square(WHITE, 20, 20)

squares.add(s)

squares.draw(screen)

pygame.display.update()

time.sleep(3)

Also note, an RGB value of (0, 30, 0) is not white, it's a dark green, if you want bright white try (255, 255, 255).

edited Dec 27 '18 at 16:57

Pedro Gaspar

541321

answered Dec 27 '18 at 16:41

Eli Rockenbeck

263

New contributor

1

Thanks, I think I got my white and black the wrong way round.
– Arkleseisure
Dec 27 '18 at 17:11

1

Didn't want completely white or completely black either, so that it would look chessboardy
– Arkleseisure
Dec 27 '18 at 20:20

Ah yeah that makes sense, if you want I have a pretty easy to use massive color library :)
– Eli Rockenbeck
Dec 29 '18 at 0:32

1

Thanks for the offer, but I'm fine with the one I've got atm :).
– Arkleseisure
Dec 29 '18 at 11:46

add a comment |

You need an event.get loop, and to update your display using pygame.display.update() after the squares.draw(screen):

import pygame

import os

import time



pygame.init()



WHITE = (0, 30, 0)

BLACK = (200, 200, 200)

screen_width = 1400

screen_height = 800

square_size = screen_height/10

screen = pygame.display.set_mode([screen_width, screen_height])

os.environ['SDL_VIDEO_WINDOWS_POS'] = '10,10'





class square(pygame.sprite.Sprite):

    def __init__(self, colour, x, y):

        super().__init__()

        self.image = pygame.Surface([square_size, square_size])

        pygame.draw.rect(self.image, colour, [0, 0, square_size, square_size])

        self.colour = colour

        self.rect = self.image.get_rect()



for event in pygame.event.get():

    pass



squares = pygame.sprite.Group()

s = square(WHITE, 20, 20)

squares.add(s)

squares.draw(screen)

pygame.display.update()

time.sleep(3)

Also note, an RGB value of (0, 30, 0) is not white, it's a dark green, if you want bright white try (255, 255, 255).

edited Dec 27 '18 at 16:57

Pedro Gaspar

541321

answered Dec 27 '18 at 16:41

Eli Rockenbeck

263

New contributor

You need an event.get loop, and to update your display using pygame.display.update() after the squares.draw(screen):

import pygame

import os

import time



pygame.init()



WHITE = (0, 30, 0)

BLACK = (200, 200, 200)

screen_width = 1400

screen_height = 800

square_size = screen_height/10

screen = pygame.display.set_mode([screen_width, screen_height])

os.environ['SDL_VIDEO_WINDOWS_POS'] = '10,10'





class square(pygame.sprite.Sprite):

    def __init__(self, colour, x, y):

        super().__init__()

        self.image = pygame.Surface([square_size, square_size])

        pygame.draw.rect(self.image, colour, [0, 0, square_size, square_size])

        self.colour = colour

        self.rect = self.image.get_rect()



for event in pygame.event.get():

    pass



squares = pygame.sprite.Group()

s = square(WHITE, 20, 20)

squares.add(s)

squares.draw(screen)

pygame.display.update()

time.sleep(3)

Also note, an RGB value of (0, 30, 0) is not white, it's a dark green, if you want bright white try (255, 255, 255).

edited Dec 27 '18 at 16:57

Pedro Gaspar

541321

answered Dec 27 '18 at 16:41

Eli Rockenbeck

263

New contributor

edited Dec 27 '18 at 16:57

Pedro Gaspar

541321

edited Dec 27 '18 at 16:57

Pedro Gaspar

541321

edited Dec 27 '18 at 16:57

Pedro Gaspar

541321

answered Dec 27 '18 at 16:41

Eli Rockenbeck

263

New contributor

answered Dec 27 '18 at 16:41

Eli Rockenbeck

263

answered Dec 27 '18 at 16:41

Eli Rockenbeck

263

New contributor

Eli Rockenbeck is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

1

Thanks, I think I got my white and black the wrong way round.
– Arkleseisure
Dec 27 '18 at 17:11

1

Didn't want completely white or completely black either, so that it would look chessboardy
– Arkleseisure
Dec 27 '18 at 20:20

Ah yeah that makes sense, if you want I have a pretty easy to use massive color library :)
– Eli Rockenbeck
Dec 29 '18 at 0:32

1

Thanks for the offer, but I'm fine with the one I've got atm :).
– Arkleseisure
Dec 29 '18 at 11:46

add a comment |

1

Thanks, I think I got my white and black the wrong way round.
– Arkleseisure
Dec 27 '18 at 17:11

1

Didn't want completely white or completely black either, so that it would look chessboardy
– Arkleseisure
Dec 27 '18 at 20:20

Ah yeah that makes sense, if you want I have a pretty easy to use massive color library :)
– Eli Rockenbeck
Dec 29 '18 at 0:32

1

Thanks for the offer, but I'm fine with the one I've got atm :).
– Arkleseisure
Dec 29 '18 at 11:46

Thanks, I think I got my white and black the wrong way round.
– Arkleseisure
Dec 27 '18 at 17:11

Didn't want completely white or completely black either, so that it would look chessboardy
– Arkleseisure
Dec 27 '18 at 20:20

Ah yeah that makes sense, if you want I have a pretty easy to use massive color library :)
– Eli Rockenbeck
Dec 29 '18 at 0:32

Thanks for the offer, but I'm fine with the one I've got atm :).
– Arkleseisure
Dec 29 '18 at 11:46

add a comment |

Most likely, your problem is that you didn't flip/update the screen.

answered Dec 27 '18 at 16:39

Lie Ryan

44.4k968121

add a comment |

Most likely, your problem is that you didn't flip/update the screen.

answered Dec 27 '18 at 16:39

Lie Ryan

44.4k968121

add a comment |

Most likely, your problem is that you didn't flip/update the screen.

answered Dec 27 '18 at 16:39

Lie Ryan

44.4k968121

Most likely, your problem is that you didn't flip/update the screen.

answered Dec 27 '18 at 16:39

Lie Ryan

44.4k968121

answered Dec 27 '18 at 16:39

Lie Ryan

44.4k968121

answered Dec 27 '18 at 16:39

Lie Ryan

44.4k968121

answered Dec 27 '18 at 16:39

Lie Ryan

44.4k968121

add a comment |

Arkleseisure is a new contributor. Be nice, and check out our Code of Conduct.

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