pygame input from keyboard doesn't work

[HyperCom]

Hi all,

i'm trying to create a little program with python and pygame but i have a problem.
I have the first model of Raspberry with 512 MB of RAM.
In my program the input from keyboard doens't work.

Code: Select all

import pygame
from pygame.locals import *
from sys import exit
  
  
#initializing variables
pygame.init()
screen=pygame.display.set_mode((640,480),0,24)
pygame.display.set_caption("Key Press Test")
f1=pygame.font.SysFont("comicsansms",24)
  
#main loop which displays the pressed keys on the screen
print("xx")
while True:
 for i in pygame.event.get():
  if i.type==QUIT:
   exit()
  a=100
  screen.fill((255,255,255))
  if pygame.key.get_focused():
    press=pygame.key.get_pressed()
    for i in range(0,len(press)): 
      if press[i]==1:
       name=pygame.key.name(i)
       print(name)
       text=f1.render(name,True,(0,0,0))
       screen.blit(text,(100,a))
       a=a+100
      pygame.display.update()

This program should print on the screen the pressed key but it doesn't print.
The programm print on the screen only numlock but not the other keys.
On Windows this program run correctly.
Can you help me?

Thank you all

[OutoftheBOTS]

Ok I have just had a quick look at your code and did just notice 1 thing at the bottom of your loop you call "pygame.display.update()" then the loop jumps back up to the top and calls "screen.fill((255,255,255))" is it possible that you need a time.sleep(0.2) after the pygame.display.update()

[HyperCom]

Thank's for the solution but the program doesn't work. I did a lot of tests and I think the reason why the program doesn't work is that the loop "for i in range(0,len(press)):" is too long and the RPI is too slow. I modified the program using the event keydown and it run correctly. In your opinion my idea is correct?