1920x1080 Image don't fit to 1920x1080 screen

Question

I'm making a game with pygame and I wanted to add a background for my game. I'm trying to add a 1920x1080 background to a 1920x1080 screen, but part of the background is not visible.

My code:

import pygame
import sys

pygame.init()

screen = pygame.display.set_mode((1920, 1080))

bg_img = pygame.image.load("wp.jpg").convert()

clock = pygame.time.Clock()

while True:
    screen.blit(bg_img, (0, 0))
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit(0)
    pygame.display.update()
    clock.tick(60)

wp.jpg:

Result:

Answer 1

I fixed the problem by changing my code to:

import pygame
import sys

pygame.init()

screen = pygame.display.set_mode((0, 0), pygame.FULLSCREEN|pygame.NOFRAME)

bg_img = pygame.image.load("wp.jpg").convert()

clock = pygame.time.Clock()

while True:
    screen.blit(bg_img, (0, 0))
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit(0)
    pygame.display.update()
    clock.tick(60)