Bullets are Not Visible, Will Not Remove From Screen After Removal - windows

Question

Here is my gaming code:
This is my entire piece of code. Why are my bullets not appearing on the screen when I fire them and
why does the bullets are still on the screen when I remove them (see lines 242 through 250)? If you have time, can you tell me why my game is lagging since I first start my game? Thank you for your help! (Already answered by another user)
class Fire_User(pygame.sprite.Sprite):
def __init__(self, image_file):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load(image_file)
self.rect = self.image.get_rect()
#Move function#
def update(self):
self.rect.x -= 10
#Class for the player 1 to be able to fire projectiles(Steve's head from Minecraft) at player 2#
class Fire_Comp(pygame.sprite.Sprite):
def __init__(self, image_file):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load(image_file)
self.rect = self.image.get_rect()
#Move function#
def update(self):
self.rect.x += 10
And the Pygame events that shoot the bullet:
elif event.key == K_LSHIFT:
bullet = Fire_User('bomb_user.jpg')
bullet.rect.x = my_ball.rect.x + 10
bullet.rect.y = my_ball.rect.y
fired = 1
bulletGroup.add(bullet)
elif event.key == K_RSHIFT:
otherBullet = Fire_Comp('steve.png')
otherBullet.rect.x = dad.rect.x - 10
otherBullet.rect.y = dad.rect.y
fired = 1
otherBulletGroup.add(otherBullet)
Update:
I am trying to blit my pictures (the bullets) onto the screen. It gives me an error:
Traceback (most recent call last):
File "E:/PyCharm_Tony/Hero's_War.py", line 273, in <module>
screen.blit(bullet.image, bullet.rect)
NameError: name 'bullet' is not defined
Why is this happening? I have edited my program. Oh, running the code snippet will only load my code in a sentence (very long).

Answer 1

The initial delay in starting the game is because of the statement
pygame.time.delay(1000)
Remove it or comment it to remove lag.
Now, instead of doing:
bullet = Fire_User()
otherBullet = Fire_Comp()
Create the instances at every event. For example:
elif event.key == K_LSHIFT:
bullet1 = Fire_User()
bullet1.rect.x = my_ball.rect.x+10
bullet1.rect.y = my_ball.rect.y
bulletGroup.add(bullet1)
This will make a bullet appear whenever you press K_LSHIFT
. I would recommend giving the positions also as the arguments to __init__ of the Fire_User() class. Reduce the increment of the rect to see the movement clearly.
As far as removing the bullet is concerned, the spritecollide function has an attribute dokill for this.
spritecollide(sprite, group, dokill, collided = None) -> Sprite_list
The dokill argument is a bool. If set to True, all Sprites that collide will be removed from the Group.