pygame creating multiple sprites - pygame

Question

I am very new to pygame, and was trying to make a basic tower defence game. I have looked around, but cannot grasp how to create multiple sprites (towers) from the image I am using. Here is my code for the TD game. But I do not know how to create more then one sprite(tower).
import pygame
import time
import sys
import os
pygame.init()
WINDOWWIDTH = 1800
WINDOWHEIGHT = 1800
os.environ['SDL_VIDEO_WINDOW_POS'] = '%i,%i' % (0,30)
screen = pygame.display.set_mode((WINDOWWIDTH, WINDOWHEIGHT))
background_colour = (63,200,70)
GAMETITLE = "Tower Defence"
font = pygame.font.SysFont(None, 100)
def balanceText(balance):
screen_text = font.render(str(balance), True, (255,255,255))
screen.blit(screen_text, [1640,0])
def main():
balance = 100
pygame.display.set_caption(GAMETITLE)
clock = pygame.time.Clock()
spritegroup =pygame.sprite.Group()
sprite =pygame.sprite.Sprite()
tower = sprite.image = pygame.image.load("tower.png")
sprite.image = tower
sprite.rect = sprite.image.get_rect()
drawTower = False
towerPlaced = False
bulletX = 250
sprite.add(spritegroup)
while True:
screen.fill(background_colour)
pygame.draw.rect(screen, (255,255,255), ((0, 100), (1100, 90)))
pygame.draw.rect(screen, (255, 255,255), ((1010, 100), (100, 600)))
pygame.draw.rect(screen, (255,255,255), ((1010, 700), (2400, 90)))
pygame.draw.rect(screen, (139,69,19), ((1600, 0), (2400, 18000)))
pygame.draw.rect(screen, (128, 128,128), (( 300,250), (140,140)))
pygame.draw.rect(screen, (128, 128,128), (( 600,250), (140,140)))
pygame.draw.rect(screen, (128, 128,128), (( 800,700), (140,140)))
pygame.draw.rect(screen, (128, 128,128), (( 1150,500), (140,140)))
balanceText(balance)
if drawTower:
spritegroup.draw(screen)
pygame.display.update()
clock.tick(30)
for event in pygame.event.get():
if event.type == pygame.MOUSEBUTTONDOWN:
if pygame.mouse.get_pressed()[0] and towerPlaced == False:
mousePos = pygame.mouse.get_pos()
if mousePos[0] > 300 and mousePos[0] < 450 and mousePos[1] > 250 and mousePos[1] < 400:
drawTower = True
sprite.rect.center = (370, 320)
towerPlaced = True
balance -= 50
elif mousePos[0] > 600 and mousePos[0] < 750 and mousePos[1] > 250 and mousePos[1] < 400:
drawTower = True
sprite.rect.center = (670, 320)
towerPlaced = True
balance-= 50
elif mousePos[0] > 800 and mousePos[0] < 950 and mousePos[1] > 700 and mousePos[1] < 850:
drawTower = True
sprite.rect.center = (870, 770)
towerPlaced = True
balance-= 50
elif mousePos[0] > 1150 and mousePos[0] < 1300 and mousePos[1] > 500 and mousePos[1] < 650:
drawTower = True
sprite.rect.center = (1220, 570)
towerPlaced = True
balance-= 50
elif event.type == pygame.QUIT:
pygame.display.quit()
main()
Thanks for looking! I know the code is a bit messy right now.

Answer 1

You need to use the Sprite class properly. To do this, you have to define your sprite as a subclass of pygame.sprite.Sprite, like this:
class Tower(pygame.sprite.Sprite):
def __init__(self, x, y):
pygame.sprite.Sprite.__init__(self)
self.image = tower_img
self.rect = self.image.get_rect()
self.rect.center = (x, y)
Then you can spawn a tower any time you like by creating another instance and adding it to the group:
new_tower = Tower(370, 320)
spritegroup.add(new_tower)
I highly recommend looking at the Sprite documentation:
http://www.pygame.org/docs/ref/sprite.html - there's lots of good info in there. There are also many good tutorials out there that go into how you use sprites in Pygame. Here is a link to one that I wrote:
http://kidscancode.org/blog/2016/08/pygame_1-2_working-with-sprites/