python pygame (scroll camera with player) [duplicate] - pygame

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This question already has answers here:
Add scrolling to a platformer in pygame
(4 answers)
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I am using pygame framework to implement my game in Python. Below is my code.
I do not know how to properly ask questions at StackOverflow, so I have included the whole program so that you can see all the details.
I would like to have a camera that would follow my player, but I do not know how to do that.
Could you, please, help me?
import pygame
pygame.init()
class Oyun():
def __init__(self):
self.x = 20
pygame.display.set_caption("Cabbar_Oyunda_Vol01")
self.uzunluk = 1280
self.genişlik = 800
self.pencere = pygame.display.set_mode((self.uzunluk, self.genişlik))
self.area = self.uzunluk * self.genişlik
self.clock = pygame.time.Clock()
self.adam = pygame.image.load("R8E.png")
self.bg = pygame.image.load("mountains.png").convert()
self.bgWidth, self.bgHeight = self.bg.get_rect().size
self.stageWidth = self.bgWidth * 2
self.stagePosX=0
self.startScrollingPosX=self.uzunluk/2
self.circleRadius=25
self.circlePosX=self.circleRadius
self.playerPosX = self.circleRadius
self.playerPosY = 685
self.playerVelocityX = 0
self.right = False
self.left = False
self.walkLeft = [pygame.image.load('L1.png'), pygame.image.load('L2.png'), pygame.image.load("L3.png"), pygame.image.load('L4.png'), pygame.image.load('L5.png'), pygame.image.load('L6.png'), pygame.image.load('L7.png'), pygame.image.load('L8.png'), pygame.image.load('L9.png')]
self.walkRight = [pygame.image.load('R1.png'), pygame.image.load('R2.png'), pygame.image.load('R3.png'), pygame.image.load('R4.png'), pygame.image.load('R5.png'), pygame.image.load('R6.png'), pygame.image.load('R7.png'), pygame.image.load('R8.png'),pygame.image.load('R9.png')]
self.walkCount=0
self.canavar_left=[pygame.image.load("L1E.png"),pygame.image.load("L2E.png"),pygame.image.load("L3E.png"),pygame.image.load("L4E.png"),pygame.image.load("L5E.png"),pygame.image.load("L6E.png"),pygame.image.load("L7E.png"),pygame.image.load("L8E.png"),pygame.image.load("L9E.png")]
self.canavar_right = [pygame.image.load("R1E.png"), pygame.image.load("R2E.png"), pygame.image.load("R3E.png"),pygame.image.load("R4E.png"), pygame.image.load("R5E.png"), pygame.image.load("R6E.png"),pygame.image.load("R7E.png"), pygame.image.load("R8E.png"), pygame.image.load("R9E.png")]
self.c_walkount=0
self.isJump = False
self.jumpCount = 10
self.sayac=0
self.yorgunluk_x=70
self.font=pygame.font.SysFont("Arial",17)
self.mermi=pygame.image.load("bullet.png")
self.mermi_x=0
self.mermi_y=0
self.mermi_stage="ready"
self.deneme=pygame.image.load("bg.jpg")
self.a = self.stagePosX + 1300
self.canavar=False
pygame.mixer.music.load("background.wav")
pygame.mixer.music.play(-1)
self.yon=1
self.scroll=[0,0]
def move(self):
self.clock.tick(40)
if self.walkCount + 1 >= 27:
self.walkCount = 0
if self.right:
self.pencere.blit(self.walkRight[self.walkCount // 3], (self.circlePosX, self.playerPosY))
self.walkCount += 1
elif self.left:
self.pencere.blit(self.walkLeft[self.walkCount // 3], (self.circlePosX, self.playerPosY))
self.walkCount += 1
else:
self.pencere.blit(self.walkRight[0], (self.circlePosX, self.playerPosY))
if self.canavar:
if self.a>1400 or self.a<1200:
self.yon*=-1
self.a += 2 * self.yon
def fire_bullet(self,circlePosX,playerPosY):
self.mermi_stage="fire"
self.pencere.blit(self.mermi,(circlePosX+40,playerPosY+20))
def kontrol(self):
keys=pygame.key.get_pressed()
if keys[pygame.K_SPACE]:
if self.mermi_stage is "ready":
self.mermi_x=self.circlePosX
self.mermi_y=self.playerPosY
self.fire_bullet(self.mermi_x,self.mermi_y)
self.mermi_ses = pygame.mixer.Sound("laser.wav")
self.mermi_ses.play()
if self.mermi_stage is "fire":
self.fire_bullet(self.mermi_x,self.mermi_y)
self.mermi_x+=18
if self.mermi_x>=1280:
self.mermi_x=self.circlePosX
self.mermi_stage="ready"
self.pencere.blit(self.adam, (self.a, 685))
def Game(self):
for event in pygame.event.get():
if event.type == pygame.QUIT:
return "son"
self.pencere.blit(self.bg, (0, 0))
keys = pygame.key.get_pressed()
if keys[pygame.K_RIGHT]:
self.left = False
self.right = True
self.circlePosX += 5
elif keys[pygame.K_LEFT]:
self.left = True
self.right = False
self.circlePosX=-5
if not (self.isJump):
if keys[pygame.K_UP]:
self.isJump = True
self.left = False
self.right = True
self.walkCount = 0
self.sayac += 1
else:
if self.jumpCount >= -10:
self.playerPosY -= (self.jumpCount * abs(self.jumpCount)) * 0.5
self.jumpCount -= 1
else:
self.jumpCount = 10
self.isJump = False
self.canavar=True
self.move()
self.kontrol()
pygame.display.update()
Game = Oyun()
while True:
Durum = Game.Game()
if Durum == "son":
break

Answer 1

A simple(but not most efficient) way to do this would be to move the background and all other assets, while keeping the player stationary.
# insert code in each object in background/assets
if right:
OBJECT.right() # code to change location
if left:
OBJECT.left() #code to change location
Also, off-topic, but it is easier to have a single direction variable with -1 for left, 0 for stationary, and 1 for right. You can also easily add speed to this, too, so keep this in mind and implement it if you can.