While loop and random number problem in python

I am making a game in which a ninja has to dodge obstacles coming in front of him, the obstacles are chosen randomly by the computer using random.randint() in the method choose() in obstacle class. The problem is that the choose() method chooses a random number in every iteration of the main loop. I want that if the x position of the obstacle is 0 then only it should choose another random number.

Remember that I am a beginner

Here is my code:

import pygame,time,random #import

pygame.init() #pygame initialization

screen = pygame.display.set_mode((0,0))
pygame.quit()
pygame.init()

clock = pygame.time.Clock()

canvas = pygame.display.set_mode((1000,780)) #creating screen
caption = pygame.display.set_caption("Ninja Run") #creating caption

iconImage = pygame.image.load("C:/Garv/python/pygame/Ninja Game/Ninja_logo.png")
icon = pygame.display.set_icon(iconImage) #drawing icon image

land = pygame.image.load("C:/Garv/python/pygame/Ninja Game/land.jfif") #land image
sky = pygame.image.load("C:/Garv/python/pygame/Ninja Game/sky.jfif") # sky image

x = 50
y = 594

start = time.time()
ninjaRun = [pygame.image.load("C:/Garv/python/pygame/Ninja Game/ninja running 1.jpg"),pygame.image.load("C:/Garv/python/pygame/Ninja Game/ninja running 2.jpg")] #ninja images
ninjaImage = ninjaRun[0]
ninjaState = "Run"

ninjaStars = [pygame.image.load("C:/Garv/python/pygame/Ninja Game/ninja star 2.jfif"),pygame.image.load("C:/Garv/python/pygame/Ninja Game/ninja star.jfif")]
tyre = pygame.image.load("C:/Garv/python/pygame/Ninja Game/tyre.jfif")
rock = pygame.image.load("C:/Garv/python/pygame/Ninja Game/rock.jfif")

rockX = 1000
rockY = 605

starX1 = 1050
starY1 = 580

starX2 = 1000
starY2 = 650

tyreX = 550
tyreY = 500

class obstacles:
    def __init__(self,stars,tyre,rock,canvas,rockX,rockY,starX1,starX2,starY1,starY2,tyreX,tyreY):
        self.stars = stars
        self.tyre = tyre
        self.rock = rock
        self.canvas = canvas
        self.rockX = rockX
        self.rockY = rockY
        self.starX1 = starX1
        self.starX2 = starX2
        self.starY1 = starY1
        self.starY2 = starY2
        self.tyreX = tyreX
        self.tyreY = tyreY
        # self.rand = rand
    def choose(self):
        self.rand = random.randint(1,3)
        if self.rand == 1:
            self.rockImage()
        if self.rand == 2:
            self.starsImage()
        if self.rand == 3:
            self.tyreImage()
    
    def rockImage(self):
        self.canvas.blit(self.rock, (self.rockX,self.rockY))
        self.rockX -= 1
        if self.rockX == 0:
            self.choose()
        
    def starsImage(self):
        self.canvas.blit(self.stars[0], (self.starX1,self.starY1))
        self.canvas.blit(self.stars[1], (self.starX2,self.starY2))
        self.starX1 -= 1
        self.starX2 -= 1
        if self.starX1 == 0 and self.starX2 == 0:
            self.choose()
    def tyreImage(self):
        self.canvas.blit(self.tyre, (self.tyreX,self.tyreY))
        self.tyreX -= 1
        if self.tyreX == 0:
            self.choose()
        

tim = 10
class Ninja:
    def __init__(self,canvas,start,run,image,x,y,time): #Initializing of variables
        self.canvas = canvas
        self.start = start
        self.run = run
        self.image = image
        self.x = x
        self.y = y
        self.time = time
    def ninja(self): #ninja movement method
        self.image = ninjaRun[0]
        self.sec = int((time.time()-self.start)*self.time)
        if self.sec % 2 != 0:
            self.image = ninjaRun[0]
        elif self.sec % 2 == 0:
            self.image = ninjaRun[1]
            
        self.canvas.blit(self.image, (self.x,self.y)) #ninja draw
        
        
player = Ninja(canvas,start,ninjaRun,ninjaRun[0],x,y,tim) #calling Ninja class
obstacle = obstacles(ninjaStars,tyre,rock,canvas,rockX,rockY,starX1,starX2,starY1,starY2,tyreX,tyreY)#obstacle class

cnt = 0

startTime = time.time()

count = 1
        
while True: #main loop
    if player.y == y:
        ninjaState = "Run"
    elif player.y != y:
        ninjaState = "Jump"
    # print(player.time)
    for event in pygame.event.get(): #event handler
        if event.type == pygame.QUIT: #quit handler
            pygame.quit()
            import sys
            sys.exit()
        if event.type == pygame.KEYDOWN: #keydown
            if event.key == pygame.K_SPACE:                 
                        
                count += 1
                if ninjaState == "Jump":
                    pass
                elif ninjaState == "Run":
                    player.y -= 300
        if event.type == pygame.KEYUP: #keyup
            if event.key == pygame.K_SPACE:
                spaceEnd = pygame.time.get_ticks()/1000
                player.y += 300
    canvas.blit(sky, (0,0))#sky drawing
    canvas.blit(land, (0,718))#land drawing
    player.ninja() #ninja drawing
    obstacle.choose()
    
    pygame.display.update() #display update
    clock.tick(100)

Any answer will be appreciated. Thanks