Feb-17-2021, 10:02 AM
I'm trying to get a pygame window with a grid of stars. Here's my code:
import sys
import pygame # contains functionality to make a game
from settings import Settings
from star import Star
class StarrySky:
"""Initialise a grid of stars on the screen."""
def __init__(self):
"""Initialise the game and create game resources."""
pygame.init() # initialise the background settings
# which the game needs to work properly
self.settings = Settings()
self.screen = pygame.display.set_mode((0,0), pygame.FULLSCREEN)
# tells pygame to figure out a window size to fill the screen
self.settings.screen_width = self.screen.get_rect().width
self.settings.screen_height = self.screen.get_rect().height
# updates the screen settings after fullscreen has been created
pygame.display.set_caption("Starry Sky")
self.star = Star(self)
def run_game(self):
"""Start the main loop for the game."""
while True:
self.check_events()
self.update_screen()
def check_events(self):
# Watch for keyboard and mouse events.
for event in pygame.event.get():
if event.type == pygame.K_q:
sys.exit()
def create_grid(self):
"""Create the grid of stars."""
# create a star and find the number of stars in a row.
# spacing between stars equal to 1 star width.
star = Star(self)
star_width, star_height = star.rect.size
available_space_x = self.settings.screen_width - (2 * alien_width)
number_stars_x = available_space_x // (2 * star_width)
# Determine the number of rows of aliens that fit on the screen.
available_space_y = (self.settings.screen_height -
(3 * alien_height) )
number_rows = available_space_y // (2 * star_height)
# Create the full sky of stars.
for row_number in range(number_rows):
# Create the first row of stars.
for star_number in range(number_stars_x):
# Create a star and place it in the row.
self._create_star(star_number,row_number)
def create_star(self, row_number, star_number):
star = Star(self)
star.x = star_width + 2 * star_width * star_number
star.rect.x = star.x
star.rect.y = star.rect.height + 2 * star.rect.height * row_number
self.stars.add(star)
def update_screen(self):
"""Update images on the screenand flip to the new screen."""
# redraw the screen during each pass through the loop
self.screen.fill(self.settings.bg_color)
self.stars.draw(self.screen)
pygame.display.flip()
if __name__ == "__main__":
# make a game instance and run the game
ai = StarrySky()
ai.run_game()
But I'm getting this error:Error: File "c:\Users\djwil\Documents\python\python crash course\Projects\Alien invasion\star_sky.py", line 75, in <module>
ai.run_game()
File "c:\Users\djwil\Documents\python\python crash course\Projects\Alien invasion\star_sky.py", line 29, in run_game
self.update_screen()
File "c:\Users\djwil\Documents\python\python crash course\Projects\Alien invasion\star_sky.py", line 69, in update_screen
self.stars.draw(self.screen)
AttributeError: 'StarrySky' object has no attribute 'stars'