how to make a player move in pygame code example

Example: how to make a player move in pygame

so let's move the palyer horizontally left right

# IF YOU HAVE MADE THE SCRIPT FOR MAKING SCREEN THE JUST COPY  
# THE SYNTAX OF THE MOVE SCRIPT
# BUT MAKE SURE YOU SEE THE DEF PLAYER


import pygame
# initialize pygame
pygame.init()

screen = pygame.display.set_mode((1370, 710))
# Player
playerIMG = pygame.image.load('ninja.png')
playerX = 650
playerY = 600
playerX_change = 0
playerY_change = 0
#You shall have a image of 64*64 pixels You can download it from flaticon.com
def player(x, y):
    screen.blit(playerIMG, (x, y))
    
	
            
#YOU NEED TO MAKE A INFINITE GAME LOOP 
# Game Loop
running = True
while running:
    # Making Background color (R=Red,G=Green,B=Blue)
    screen.fill((192, 192, 192))
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
            
     # THE MOVE SCRIPT!!!!
    if event.type == pygame.KEYDOWN:
        if event.key == pygame.K_LEFT:
            playerX_change = -1
            
        if event.key == pygame.K_RIGHT:
            playerX_change = 1
            
        if event.key == pygame.K_UP:
            playerY_change == 10
            
    if event.type == pygame.KEYUP:
        if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
            playerX_change = 0

#IN THERE YOU NEED TO WRITE THE FUNCTION
	player(playerX, playerY)
# THERE YOU GO THATS ALL YOU NEED TO MOVE THE PLAYER (LEFT AND RIGHT)