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Why does rotated image move by itself?

I rotate an image and I adjust the rect to the rotated image. When I start the program, the image starts moving, without any order by the program. There are, for testing, some pictures needed. I hope, as more experienced users, can take some standards.
import pygame
import sys
from pygame.constants import KEYUP
from pygame.constants import KEYDOWN
import math
import random
pygame.init()
cell_size = 40
cell_number = 20
breite = int(cell_size * cell_number )
hoehe = int( cell_size * cell_number )
screen = pygame.display.set_mode((breite,hoehe))
clock = pygame.time.Clock()
anzahl_gegenstaende = 10 # gehört zu landschaft
class MeinAuto(pygame.sprite.Sprite):
def __init__(self,x,y):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.transform.scale(auto_img,(30,66)).convert_alpha()
self.rect = self.image.get_rect(center=(x,y))
self.rect.x = x
self.rect.y = y
self.mask = pygame.mask.from_surface(self.image )
self.wagen_winkel = 0
self.speed = 5
self.links = False
self.rechts = False
self.vor = False
self.zurueck = False
self.lenk_winkel = 0
self.block_vor = False
self.block_zurueck = False
def update(self):
for event in events:
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
if self.vor or self.zurueck:
self.links = True
if event.key == pygame.K_RIGHT:
if self.vor or self.zurueck:
self.rechts = True
if event.key == pygame.K_UP:
self.vor = True
if event.key == pygame.K_DOWN:
self.zurueck = True
elif event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT:
self.links = False
if event.key == pygame.K_RIGHT:
self.rechts = False
if event.key == pygame.K_UP:
self.vor = False
if event.key == pygame.K_DOWN:
self.zurueck = False
self.winkel_berechnung(1)
dx = math.cos(math.radians(self.wagen_winkel))
dy = math.sin(math.radians(self.wagen_winkel))
if self.vor and self.block_vor == False:
self.rect.y -= int(self.speed * dx)
self.rect.x -= int(self.speed * dy)
self.block_zurueck = False
elif self.zurueck and self.block_zurueck == False:
self.rect.y += int(self.speed * dx)
self.rect.x += int(self.speed * dy)
self.block_vor = False
if self.links:
self.lenk_winkel +=5
self.lenk_winkel=min(self.lenk_winkel,120)
elif self.rechts:
self.lenk_winkel -=1
self.lenk_winkel=max(self.lenk_winkel,-120)
if not self.links and not self.rechts: self.lenk_winkel = 0
def winkel_berechnung(self,dt):
if self.rechts:
self.wagen_winkel += self.lenk_winkel
while self.wagen_winkel < 0:
self.wagen_winkel += 360
elif self.links:
self.wagen_winkel += self.lenk_winkel
while self.wagen_winkel > 359:
self.wagen_winkel -= 360
class Lenkung(pygame.sprite.Sprite):
def __init__(self,x,y):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.transform.scale(lenkrad_img,(120,120)).convert_alpha()
self.rect = self.image.get_rect()
self.rect.x = x
self.rect.y = y
self.wagen_winkel = 0
class Landschaft(pygame.sprite.Sprite):
def __init__(self,image):
pygame.sprite.Sprite.__init__(self)
self.image = image
self.mask = pygame.mask.from_surface(self.image )
x=random.randrange(60, breite -60)
y=random.randrange(200, hoehe - 200)
self.rect = self.image.get_rect(center =(x,y))
def zeichne_hintergrund():
background = pygame.image.load("Bilder/background_gelb.jpg")
screen.blit(background,(0,0))
def blitRotateCenter(image, left, top, angle):
rotated_image = pygame.transform.rotate(image, angle)
new_rect = rotated_image.get_rect(center = image.get_rect(center = (left, top)).center)
screen.blit(rotated_image, new_rect)
return new_rect
########## Bilder laden
auto_img = pygame.image.load("Bilder/car.png")
lenkrad_img = pygame.image.load("bilder/lenkrad.png")
######### Gruppen bilden
auto = MeinAuto(breite/2,hoehe-100)
auto_sprite = pygame.sprite.Group()
auto_sprite.add(auto)
lenkung = Lenkung(breite/2,60)
lenkung_sprite = pygame.sprite.Group()
lenkung_sprite.add(lenkung)
land = pygame.sprite.Group()
while len(land) < anzahl_gegenstaende:
ii = len(land)
img = pygame.image.load(f"Bilder/Gegenstaende/geg{ii}.png")
img = pygame.transform.scale(img,(100,100))
m = Landschaft(img)
if not pygame.sprite.spritecollide(m, land, False):
land.add(m)
while True:
clock.tick(6)
zeichne_hintergrund()
events = pygame.event.get()
for event in events:
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
hits = pygame.sprite.spritecollide( auto, land, False, pygame.sprite.collide_mask)
for hit in hits:
pass
auto_sprite.update()
land.draw(screen)
new_auto_rect =blitRotateCenter(auto.image, auto.rect.x, auto.rect.y, auto.wagen_winkel)
auto.rect=new_auto_rect
new_auto_rect = new_auto_rect.inflate(-80,-50)
blitRotateCenter(lenkung.image, lenkung.rect.x, lenkung.rect.y, auto.lenk_winkel)
pygame.draw.rect(screen,(0,250,0),auto.rect,4)
pygame.draw.rect(screen,(250,250,0),new_auto_rect,1)
pygame.display.flip()

Instead of the upper left corner of the image, you have to pass the center of the image to the blitRotateCenter function:
new_auto_rect = blitRotateCenter(auto.image, auto.rect.x, auto.rect.y, auto.wagen_winkel)
new_auto_rect = blitRotateCenter(auto.image, auto.rect.centerx, auto.rect.centery, auto.wagen_winkel)
Simplify the code using the asterisk(*) operator:
new_auto_rect = blitRotateCenter(auto.image, *auto.rect.center, auto.wagen_winkel)

How to i make an sprite rotate smoothly

I neew help with making my sprites rotate smoothly.
Right now i have to press the botton multiple times to rotate the sprites.
When I rotate the sprites it also warps the sprites in a weird way.
if you go down to the main loop you can see how i tried to implement the rotation in my code right now.
I am new to programming so i would appreciate if anyone could ELI5.
import pygame as pg
import sys
x, y = 0, 0
class Rocket(pg.sprite.Sprite):
def __init__(self, picture_path, x, y):
super().__init__()
self.image = pg.image.load(picture_path)
self.image = pg.transform.scale(self.image, (120, 100))
self.angle_change = 0
self.angle = 90 + self.angle_change
self.image = pg.transform.rotate(self.image, self.angle)
self.rect = self.image.get_rect()
self.rect.x = 900
self.rect.y = 400
self.pressed_w = False
self.pressed_a = False
self.pressed_s = False
self.pressed_d = False
self.speed = 3
self.gravity = False
def update(self):
if self.pressed_a:
self.rect.x -= self.speed
if self.pressed_d:
self.rect.x += self.speed
if self.pressed_w:
self.rect.y -= self.speed
if self.pressed_s:
self.angle_change += 3
if self.gravity:
self.rect.y += self.speed
if self.rect.left < 0: self.rect.left = 0
if self.rect.right > width: self.rect.right = width
if self.rect.top < 0: self.rect.top = 0
if self.rect.bottom > height: self.rect.bottom = height
class Rocket1(pg.sprite.Sprite):
def __init__(self, picture_path, x, y):
super().__init__()
self.image = pg.image.load(picture_path)
self.image = pg.transform.scale(self.image, (120, 100))
self.rotate = 90
self.image = pg.transform.rotate(self.image, self.rotate)
self.rect = self.image.get_rect()
self.rect.x = 900
self.rect.y = 400
self.pressed_up = False
self.pressed_left = False
self.pressed_down = False
self.pressed_right = False
self.speed = 3
self.gravity = False
def update(self):
if self.pressed_left:
self.rect.x -= self.speed
if self.pressed_right:
self.rect.x += self.speed
if self.pressed_up:
self.rect.y -= self.speed
if self.pressed_down:
self.rect.y += self.speed
if self.gravity:
self.rect.y += self.speed
if self.rect.left < 0: self.rect.left = 0
if self.rect.right > width: self.rect.right = width
if self.rect.top < 0: self.rect.top = 0
if self.rect.bottom > height: self.rect.bottom = height
pg.init()
clock = pg.time.Clock()
width = 1920
height = 1080
screen = pg.display.set_mode((width, height))
background = pg.image.load("bg.jpg")
#rocket
player_rect = Rocket("rocket.png", x, y)
player_rect1 = Rocket1("rocketflames.png", x, y)
rocket_group = pg.sprite.Group()
rocket_group.add(player_rect,player_rect1)
while True:
rocket_rotate = 0
for event in pg.event.get():
if event.type == pg.QUIT:
pg.quit()
sys.exit()
if event.type == pg.KEYDOWN:
if event.key == pg.K_w:
player_rect.pressed_w = True
player_rect.gravity = False
if event.type == pg.KEYDOWN:
if event.key == pg.K_s:
rocket_rotate += 1
for rocket in rocket_group:
rocket.image = pg.transform.rotate(rocket.image, rocket_rotate)
if event.type == pg.KEYDOWN:
if event.key == pg.K_d:
player_rect.pressed_d = True
if event.type == pg.KEYDOWN:
if event.key == pg.K_a:
player_rect.pressed_a = True
if event.type == pg.KEYUP:
if event.key == pg.K_w:
player_rect.pressed_w = False
player_rect.gravity = True
if event.type == pg.KEYUP:
if event.key == pg.K_s:
rocket_rotate += 0
for rocket in rocket_group:
rocket.image = pg.transform.rotate(rocket.image, rocket_rotate)
if event.type == pg.KEYUP:
if event.key == pg.K_d:
player_rect.pressed_d = False
player_rect.gravity = True
if event.type == pg.KEYUP:
if event.key == pg.K_a:
player_rect.pressed_a = False
player_rect.gravity = True
###
if event.type == pg.KEYDOWN:
if event.key == pg.K_UP:
player_rect1.pressed_up = True
player_rect1.gravity = False
if event.type == pg.KEYDOWN:
if event.key == pg.K_DOWN:
player_rect1.pressed_down = True
if event.type == pg.KEYDOWN:
if event.key == pg.K_RIGHT:
player_rect1.pressed_right = True
if event.type == pg.KEYDOWN:
if event.key == pg.K_LEFT:
player_rect1.pressed_left = True
if event.type == pg.KEYUP:
if event.key == pg.K_UP:
player_rect1.pressed_up = False
player_rect1.gravity = True
if event.type == pg.KEYUP:
if event.key == pg.K_DOWN:
player_rect1.pressed_down = False
player_rect1.gravity = True
if event.type == pg.KEYUP:
if event.key == pg.K_RIGHT:
player_rect1.pressed_right = False
player_rect1.gravity = True
if event.type == pg.KEYUP:
if event.key == pg.K_LEFT:
player_rect1.pressed_left = False
player_rect1.gravity = True
pg.display.flip()
screen.blit(background, (0, 0))
rocket_group.draw(screen)
rocket_group.update()
clock.tick(120)

You have to use the pygame.key.get_pressed() instead of the keybord events.
The keyboard events (see pygame.event module) occur only once when the state of a key changes. The KEYDOWN event occurs once every time a key is pressed. KEYUP occurs once every time a key is released. Use the keyboard events for a single action or a step-by-step movement.
pygame.key.get_pressed() returns a list with the state of each key. If a key is held down, the state for the key is True, otherwise False. Use pygame.key.get_pressed() to evaluate the current state of a button and get continuous movement.
Additionally I recommend reading How do I rotate an image around its center using PyGame?.

My Simple Platformer Character Drifts Left but not Right and I Can't Find the Bug That Causes It [duplicate]

This question already has answers here:
Pygame doesn't let me use float for rect.move, but I need it
(2 answers)
Simple drag physics, acting differently when moving left or right [duplicate]
(1 answer)
Closed 2 years ago.
Basically I am working on a simple platformer and I have all of the basics like the gravity, acceleration, and platforms, but for some reason the character will decelerate going right, but when it goes left it will continue moving slowly instead of stopping. I even printed the value of my variable "changeX" to see what was going on, and it showed me the values I that should be happening rather than what was displayed. Sorry my comments are very limited in their helpfulness. The code regarding variables rect.x , changeX, and accelX are likely the most relevant.
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
BLUE = (50, 50, 255)
# Screen dimensions
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
COLOR = BLUE
#Top Speed
tSpeedX = 7
tSpeedY = 20
#gravity constant
gConstant = 1
#acceleration X variable
accelX = 0
#acceleration Y variable
accelY = 0
#whether you can jump or not
jumpB = True
class player(pygame.sprite.Sprite):
def __init__(self, x, y):
super().__init__()
#iniatilized values for rect
self.image = pygame.Surface([50, 50])
self.image.fill(COLOR)
self.rect = self.image.get_rect()
self.rect.x = x
self.rect.y = y
self.changeX = 0
self.changeY = 0
self.walls = None
#the velocity function. X and Y values are assigned based on the accelX
#and Y constants and added to the points of the rectangle
def velocity(self,x,y):
#change in speed
self.changeX += x
self.changeY += y
if abs(self.changeX) >= tSpeedX:
self.changeX = self.changeX/abs(self.changeX) * tSpeedX
if abs(self.changeY) >= tSpeedY:
self.changeY = self.changeY/abs(self.changeY) * tSpeedY
#standard update function. Will update rectangles position and deaccelerate it if no key held
def jump(self,y):
self.changeY = y
def update(self):
if accelX == 0:
self.changeX *= 0.92
if accelY == 0:
self.changeY *= .95
self.rect.x += self.changeX
print(self.changeX)
block_hit_list = pygame.sprite.spritecollide(self, self.walls, False)
for block in block_hit_list:
if self.changeX > 0:
self.rect.right = block.rect.left
else:
self.rect.left = block.rect.right
self.rect.y += self.changeY + (9*gConstant)
block_hit_list = pygame.sprite.spritecollide(self, self.walls, False)
for block in block_hit_list:
if self.changeY >= -5:
global jumpB
jumpB = True
COLOR = WHITE
self.rect.bottom = block.rect.top
else:
self.rect.top = block.rect.bottom
class wall(pygame.sprite.Sprite):
def __init__(self, sx, sy,px,py):
super().__init__()
#iniatilized values for walls
collision = False
self.image = pygame.Surface([sx, sy])
self.image.fill(WHITE)
self.rect = self.image.get_rect()
self.rect.x = px
self.rect.y = py
pygame.init()
screen = pygame.display.set_mode([SCREEN_WIDTH, SCREEN_HEIGHT])
spriteList = pygame.sprite.Group()
wallList = pygame.sprite.Group()
Player = player(100,100)
spriteList.add(Player)
Wall1 = wall(1000, 30, 0, 400)
Wall2 = wall(100, 30, 150, 350)
wallList.add(Wall2)
spriteList.add(Wall2)
wallList.add(Wall1)
spriteList.add(Wall1)
Player.walls = wallList
clock = pygame.time.Clock()
#Allows program to exit
quit = False
while not quit:
for event in pygame.event.get():
if event.type == pygame.QUIT:
quit = True
#Sets accel values
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
accelX = -.25
if event.key == pygame.K_RIGHT:
accelX = .25
if event.key == pygame.K_UP and jumpB == True:
Player.jump(-20)
jumpB = False
COLOR = BLUE
if event.key == pygame.K_DOWN:
accelY = .25
#reverses accel values to allow for deaccleration
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT:
accelX = 0
if event.key == pygame.K_RIGHT:
accelX = 0
if event.key == pygame.K_UP:
accelY = 0
if event.key == pygame.K_DOWN:
accelY = 0
#calls function to move rectangle
Player.velocity(accelX, accelY)
spriteList.update()
screen.fill(BLACK)
spriteList.draw(screen)
pygame.display.flip()
clock.tick(60)

How to make a brake function for a car pygame [closed]

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Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 4 years ago.
Improve this question
i am new to python and i wanted to know how to make the car have a braking function by pressing spacebar. I have put controls to make the car go left right forward and reverse, but slowing down is what i need using the spacebar. I don't know if my code is required to answer the question but here it is anyways.
Thanks
import math
import random
import pygame
WHITE = pygame.Color('white')
VEHICLE1 = pygame.Surface((40, 70), pygame.SRCALPHA)
VEHICLE1.fill((130, 180, 20))
#blitting car onto 'rectangle car'
VEHICLE1 = pygame.image.load("YellowLambo.png")
screen.blit(VEHICLE1,(0,0))
pygame.display.update()
VEHICLE2 = pygame.Surface((40, 70), pygame.SRCALPHA)
VEHICLE2.fill((200, 120, 20))
#blitting computer's car
VEHICLE2 = pygame.image.load("RedLambo.png")
screen.blit(VEHICLE2,(0,0))
pygame.display.update()
BACKGROUND = pygame.Surface((1280, 800))
BACKGROUND.fill((127, 69, 2))
BACKGROUND = pygame.image.load("track2.png").convert()
screen.blit(BACKGROUND,(0,0))
pygame.display.update()
class Entity(pygame.sprite.Sprite):
def __init__(self):
pygame.sprite.Sprite.__init__(self)
class VehicleSprite(Entity):
MAX_FORWARD_SPEED = 10
MAX_REVERSE_SPEED = 2
ACCELERATION = 0.05
TURN_SPEED = 0.000000000001
def __init__(self, image, position):
Entity.__init__(self)
self.src_image = image
self.image = image
self.rect = self.image.get_rect(center=position)
self.position = pygame.math.Vector2(position)
self.velocity = pygame.math.Vector2(0, 0)
self.speed = self.direction = 0
self.k_left = self.k_right = self.k_down = self.k_up = 0
def update(self, time):
# SIMULATION
self.speed += self.k_up + self.k_down
# To clamp the speed.
self.speed = max(-self.MAX_REVERSE_SPEED,
min(self.speed, self.MAX_FORWARD_SPEED))
# Degrees sprite is facing (direction)
self.direction += (self.k_right + self.k_left)
rad = math.radians(self.direction)
self.velocity.x = -self.speed*math.sin(rad)
self.velocity.y = -self.speed*math.cos(rad)
self.position += self.velocity
self.image = pygame.transform.rotate(self.src_image, self.direction)
self.rect = self.image.get_rect(center=self.position)
class Background(pygame.sprite.Sprite):
def __init__(self, image, location):
pygame.sprite.Sprite.__init__(self)
self.image = image
self.rect = self.image.get_rect(topleft=location)
def game_loop():
bike = VehicleSprite(VEHICLE1, rect.center)
ball = VehicleSprite(VEHICLE2, rect.center)
bike_group = pygame.sprite.Group(bike)
ball_group = pygame.sprite.Group(ball)
all_sprites = pygame.sprite.Group(bike_group, ball_group)
background = Background(BACKGROUND, [0, 0])
camera = pygame.math.Vector2(0, 0)
done = False
while not done:
time = clock.tick(60)
for event in pygame.event.get():
if event.type == pygame.QUIT:
done = True
elif event.type == pygame.KEYDOWN:
# Bike Input (Player 1)
if event.key == pygame.K_d:
bike.k_right = -5
elif event.key == pygame.K_a:
bike.k_left = 5
elif event.key == pygame.K_w:
bike.k_up = 2
elif event.key == pygame.K_s:
bike.k_down = -2
elif event.key == pygame.K_ESCAPE:
done = True
elif event.type == pygame.KEYUP:
if event.key == pygame.K_d:
bike.k_right = 0
elif event.key == pygame.K_a:
bike.k_left = 0
elif event.key == pygame.K_w:
bike.k_up = 0
elif event.key == pygame.K_s:
bike.k_down = 0
camera -= bike.velocity
#screen.blit(background.image, background.rect)
all_sprites.update(time)
screen.fill(WHITE)
screen.blit(background.image, background.rect.topleft+camera)
for sprite in all_sprites:
screen.blit(sprite.image, sprite.rect.topleft+camera)
pygame.display.flip()
game_loop()
pygame.quit()

Just add a self.k_break attribute, set it to True when the player breaks and then decrease the self.speed if it's greater than 0 and increase it if it's less than 0. Use max and min, so that it stops at 0.
def update(self, time):
self.speed += self.k_up + self.k_down
if self.k_break:
if self.speed > 0:
self.speed = max(0, self.speed-0.5)
elif self.speed < 0:
self.speed = min(0, self.speed+0.5)

Pygame player movement stops when too many keys are pressed at the same time

When I try to move my character and press any other key at the same time, the movement suddenly stops. For example, the space key in my code is used to shoot a tiny orb out of the spaceship. Every time I press space and I am moving left and right quickly, the orb will shoot out but the player movement will be frozen for a second or two.
I have tried to switch to different ways of handling the way keys are input, but all of them seem to lead to this same problem. pygame.key.get_pressed() also has this problem when in my code.
I am not quite sure if this is a problem with my laptop keyboard or something in the code, so the code for the entire file is below.
import pygame, sys, decimal
# Screen Size
SCREEN_X = 400
SCREEN_Y = 400
# Loading Images
backgroundImg = pygame.image.load('StarBackground.png')
menuBar = pygame.image.load('Menu_Bar.png')
shipImg = pygame.image.load('PowerShip.png')
orb = pygame.image.load('Orb00.png')
class Ship(pygame.sprite.Sprite):
# Movement rate of change
change_x = 0
# Methods
def __init__(self):
pygame.sprite.Sprite.__init__(self)
self.image = shipImg.convert_alpha()
self.rect = self.image.get_rect()
self.rect.x = SCREEN_X / 2 - 8
self.rect.y = SCREEN_Y - 40
def move(self, speed):
self.change_x = speed
def stop(self):
self.change_x = 0
def update(self, screen):
self.rect.x += self.change_x
if self.rect.x < 0:
self.rect.x = 0
elif self.rect.right > SCREEN_X:
self.rect.x -= 1
screen.blit(self.image, self.rect)
class MenuBar(pygame.sprite.Sprite):
def __init__(self):
pygame.sprite.Sprite.__init__(self)
self.image = menuBar.convert_alpha()
self.rect = self.image.get_rect()
self.rect.x = 10
self.rect.y = 0
def update(self, screen):
screen.blit(self.image,self.rect)
class Bullet1(pygame.sprite.Sprite):
def __init__(self,x,y):
pygame.sprite.Sprite.__init__(self)
self.image = orb.convert_alpha()
self.rect = self.image.get_rect()
self.rect.x = x
self.rect.y = y
self.alive = True
def update(self):
if self.alive == True:
self.rect.y -= 1
if self.alive == False:
self.rect.y = -10000
class HealthBar(pygame.sprite.Sprite):
pass
class EnergyBar(pygame.sprite.Sprite):
pass
class PointsBar(pygame.sprite.Sprite):
pass
class Background(pygame.sprite.Sprite):
def __init__(self):
pygame.sprite.Sprite.__init__(self)
self.image = backgroundImg.convert_alpha()
self.rect = self.image.get_rect()
self.rect.x = 0
self.rect.y = 0
def update(self, screen):
if self.rect.top > 0:
self.rect.y = SCREEN_Y * -1
self.rect.y += 1
screen.blit(self.image, self.rect)
def main():
pygame.init()
size = [SCREEN_X, SCREEN_Y]
screen = pygame.display.set_mode(size, pygame.DOUBLEBUF) # Set the height and width of the screen
pygame.display.set_caption("Space Adventure") # Setting the game name in the title bar
background = Background() # Creating the game objects
menubar = MenuBar()
ship = Ship()
finished = False # Close button exit code
bullet1Enabled = True
bullet1Count = 1
spacePressed = False
clock = pygame.time.Clock() # Manages the frames per second
lastkey = None # Variable that stores the last key pressed
bulletlist = []
# Game loop
while not finished:
for event in pygame.event.get():
print(lastkey)
if event.type == pygame.QUIT:
finished = True
pygame.event.set_blocked(pygame.MOUSEMOTION)
if event.type == pygame.KEYDOWN:
if lastkey != pygame.K_SPACE:
lastkey = event.key
if event.key == pygame.K_SPACE:
spacePressed = True
if bullet1Enabled == True:
bullet1 = Bullet1(ship.rect.x, ship.rect.y)
bulletlist.append(bullet1)
bullet1Count = 1
else:
spacePressed = False
if event.type == pygame.KEYUP:
if event.key == pygame.K_RIGHT and lastkey != pygame.K_LEFT:
lastkey = None
ship.move(0)
if event.key == pygame.K_LEFT and lastkey != pygame.K_RIGHT:
lastkey = None
ship.move(0)
if event.key == pygame.K_RIGHT or lastkey == pygame.K_LEFT:
spacePressed = False
if event.key == pygame.K_LEFT or lastkey == pygame.K_RIGHT:
spacePressed = False
#Bullet Delay
if spacePressed == True:
bullet1Count = True
if spacePressed == False:
bullet1Count = False
if lastkey == pygame.K_RIGHT:
ship.move(1)
if lastkey == pygame.K_LEFT:
ship.move(-1)
clock.tick(240) # Frames per second
background.update(screen) # Background update
# Menu Bar update
ship.update(screen) # Ship update
for b in bulletlist:
if b.rect.bottom <= 0:
b.alive = False
b.update()
screen.blit(b.image, b.rect)
menubar.update(screen)
pygame.display.flip() # Updates the display for everything
pygame.quit() # Clean shutdown on IDLE
if __name__ == "__main__":
main()

The problem occurs because you don't reset lastkey to None after you release the space bar, so you have to press left or right twice.
if event.type == pygame.KEYUP:
if event.key == pygame.K_SPACE:
lastkey = None
I don't see why you need the lastkey variable at all. I'd remove these lines from the main loop,
if lastkey == pygame.K_RIGHT:
ship.move(1)
if lastkey == pygame.K_LEFT:
ship.move(-1)
insert them in the event loop and change lastkey to event.key:
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_RIGHT:
ship.move(1)
if event.key == pygame.K_LEFT:
ship.move(-1)
Now you should be able to remove the lastkey completely.