Piano tiles: background image - python-3.x

Question

I'm trying to make piano tiles in python using pygame. So, I've started with making an intro window but I'm unable to upload a background image1 in my into window. I actually want to display the name 'Piano tiles' and the background image whenever the player starts the game. Here's my code:
import pygame,os,random,time
from pygame.locals import *
wix=800
wiy=800
pygame.init()
white=(255,255,255)
black = (0,0,0)
red = (255,0,0)
green = (0,155,0)
clock = pygame.time.Clock()
smallfont = pygame.font.SysFont("comicsansms", 25)
medfont = pygame.font.SysFont("comicsansms", 50)
largefont = pygame.font.SysFont("comicsansms", 100)
gameDisplay=pygame.display.set_mode((wix,wiy))
bg = pygame.image.load("background.jpg")
pygame.display.set_caption("Piano Tiles")
def game_intro():
screen=pygame.display.set_mode((wix,wiy))
intro =True
while intro:
bg = pygame.image.load("background.jpg")
screen.blit(bg,(0,0))
gameDisplay.fill(white)
message_to_screen("PIANO TILES",black,-100,"large")
pygame.display.update()
clock.tick(8)
def text_objects(text,color,size):
if size == "small":
textSurface = smallfont.render(text, True, color)
elif size == "medium":
textSurface = medfont.render(text, True, color)
elif size == "large":
textSurface = largefont.render(text, True, color)
return textSurface, textSurface.get_rect()
def message_to_screen(msg,color, y_displace=0, size = "small"):
textSurf, textRect = text_objects(msg,color, size)
textRect.center = (wix/ 2), (wiy / 2)+y_displace
gameDisplay.blit(textSurf, textRect)
game_intro()
pygame.time.wait(4000)
pygame.quit()
quit()

Answer 1

You have to use fill(white) before you blit anything because it clear screen.
It could look like this
import pygame
# --- constants --- (UPPER_CASE names)
WIX = 800
WIY = 800
WHITE = (255,255,255)
BLACK = ( 0, 0, 0)
RED = (255, 0, 0)
GREEN = ( 0,155, 0)
FPS = 8
# --- functions --- (lower_case names)
def text_objects(text, color, size):
if size == "small":
text_font = small_font
elif size == "medium":
font = med_font
elif size == "large":
font = large_font
#fonts = {"small": small_font, "medium": med_font, "large": large_font}
#font = fonts[size]
text_surface = font.render(text, True, color)
text_rect = text_surface.get_rect()
return text_surface, text_rect
def message_to_screen(screen, msg, color, y_displace=0, size="small"):
text_surface, text_rect = text_objects(msg, color, size)
text_rect.center = screen.get_rect().center
text_rect.y += y_displace
screen.blit(text_surface, text_rect)
def game_intro(screen, text):
#bg = pygame.image.load("background.jpg")
screen.fill(WHITE) # use if background is smaller then screen
screen.blit(bg, (0,0))
message_to_screen(screen, text, BLACK, -100, "large")
message_to_screen(screen, text, BLACK, 0, "large")
message_to_screen(screen, text, BLACK, 100, "large")
pygame.display.update()
clock = pygame.time.Clock()
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
return False # exit program
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
return True # go to next stage
elif event.type == pygame.MOUSEBUTTONDOWN:
if event.button == 1:
return True # go to next stage
clock.tick(FPS)
# --- main --- (lower_case names)
# - init -
pygame.init()
screen = pygame.display.set_mode((WIX, WIY))
#screen_rect = screen.get_rect()
pygame.display.set_caption("Piano Tiles")
# - resources -
bg = pygame.image.load("Obrazy/test.png")#"background.jpg")
small_font = pygame.font.SysFont("comicsansms", 25)
med_font = pygame.font.SysFont("comicsansms", 50)
large_font = pygame.font.SysFont("comicsansms", 100)
#fonts = {"small": small_font, "medium": med_font, "large": large_font}
# - stages -
go_next = game_intro(screen, "HELLO WORLD")
if go_next:
go_next = game_intro(screen, "PIANO TILES")
if go_next:
go_next = game_intro(screen, "BYE, BYE")
# - exit -
pygame.quit()