I'm creating a shooting game and I don't want to allow unlimited bullets to be shot on the screen, so how can I limit the amount of bullets fired.

heres the code

# Sample Python/Pygame Programs
# Simpson College Computer Science
# http://programarcadegames.com/
# http://simpson.edu/computer-science/
import pygame, sys, random
from pygame.locals import *
from threading import Timer



# Define some colors
black    = (   0,   0,   0)
white    = ( 255, 255, 255)
red      = ( 255,   0,   0)
blue     = (   0,   0, 255)

bullet_count = 0

# This class represents the Player        
class Player(pygame.sprite.Sprite):



    def __init__(self):
        # Call the parent class (Sprite) constructor

        pygame.sprite.Sprite.__init__(self) 

        self.image = pygame.Surface([20,20])
        self.image.fill(red)

        self.rect = self.image.get_rect()



# This class represents the bullet        
class Bullet(pygame.sprite.Sprite):

    def __init__(self):
        # Call the parent class (Sprite) constructor
        pygame.sprite.Sprite.__init__(self) 

        self.image = pygame.Surface([10, 4])
        self.image.fill(black)

        self.rect = self.image.get_rect()



class Shoot(pygame.sprite.Sprite):

    def __init__(self):
        # Call the parent class (Sprite) constructor
        pygame.sprite.Sprite.__init__(self) 

        self.image = pygame.Surface([10, 4])
        self.image.fill(black)

        self.rect = self.image.get_rect()







# Initialize Pygame
pygame.init()





# Set the height and width of the screen
screen_width=700
screen_height=400
screen=pygame.display.set_mode([screen_width,screen_height])

# This is a list of every sprite. All blocks and the player block as well.
all_sprites_list = pygame.sprite.Group()


# List of each bullet
bullet_list = pygame.sprite.Group()

shoot_list = pygame.sprite.Group()

# Create a red player block
player = Player()
all_sprites_list.add(player)

#Loop until the user clicks the close button.
done=False

# Used to manage how fast the screen updates
clock=pygame.time.Clock()

score = 0
player.rect.y=370







# -------- Main Program Loop -----------
while done==False:
    # ALL EVENT PROCESSING SHOULD GO BELOW THIS COMMENT
    for event in pygame.event.get(): # User did something
        if event.type == pygame.QUIT: # If user clicked close
            done=True # Flag that we are done so we exit this loop
        if event.type == KEYDOWN:

            if event.key == K_LEFT:  
                bullet = Bullet()
                bullet.rect.x = player.rect.x
                bullet.rect.y = player.rect.y
                all_sprites_list.add(bullet)
                bullet_list.add(bullet)





            if event.key == K_RIGHT:  
                shoot = Shoot()
                shoot.rect.x = player.rect.x
                shoot.rect.y = player.rect.y
                all_sprites_list.add(shoot)
                shoot_list.add(shoot)                        



























    # ALL EVENT PROCESSING SHOULD GO ABOVE THIS COMMENT

    # ALL GAME LOGIC SHOULD GO BELOW THIS COMMENT

    # Calculate mechanics for each bullet

    bulletCounter = 0

    for bullet in bullet_list:
        bullet.rect.x -= 5





    for shoot in shoot_list:
        shoot.rect.x -= -5
















        # Remove the bullet if it flies up off the screen
        if bullet.rect.y < -10:
            bullet_list.remove(bullet)
            all_sprites_list.remove(bullet)

    # Get the current mouse position. This returns the position
    # as a list of two numbers.
    pos = pygame.mouse.get_pos()

    # Set the player x position to the mouse x position
    player.rect.x=pos[0]

    # ALL GAME LOGIC SHOULD GO ABOVE THIS COMMENT

    # ALL CODE TO DRAW SHOULD GO BELOW THIS COMMENT

    # Clear the screen
    screen.fill(white)

    # Draw all the spites
    all_sprites_list.draw(screen)

    # ALL CODE TO DRAW SHOULD GO ABOVE THIS COMMENT

    # Limit to 20 frames per second
    clock.tick(20)

    # Go ahead and update the screen with what we've drawn.
    pygame.display.flip()

pygame.quit()

  1. Put the bullets in to a variable for example b = 50
  2. Before you run the code to shoot the bullet check that b != 0
  3. When the piece of code is run -1 from this variable.
  4. You can print the number of bullets on the screen by using the following:

    myfont = pygame.font.SysFont("monospace", 17
    label = myfont.render(BulletsVar, 1, (255,255,0))

    In the main loop:
    self.screen.blit(label, (10, 35))

Hope this helps - Mat

actually i was wondering if i could just have sort of a delay between the bullets so u cant rapid fire it. Sorry if i phrased the question wrong

try this?

import time

# In a loop

# Fire Bullet
time.sleep(1)   # This will pause the fireing for 1 second just position it so it doesn't pause the whole program

So it would be in the function for firing the bullets, not in the actual main loop.