python - Pygame Button getRect Collidepoint not working? -

i have finished main code game , have started on making menu screen. can display buttons on screen fine when click somewhere error:

how can go fixing this? if didn't make clear in question please tell me can clarify. thanks!

here code menuscreen:

import pygame import random import time  pygame.init()  #colours white = (255,255,255) black = (0,0,0) red = (255,0,0) green = (0,155,0) blue = (50,50,155)   display_width = 800   display_height = 600   gamedisplay = pygame.display.set_mode((display_width,display_height))  pygame.display.set_caption('numeracy ninjas')  clock = pygame.time.clock()  #fonts  smallfont = pygame.font.sysfont("comicsansms", 25) medfont = pygame.font.sysfont("comicsansms", 50) largefont = pygame.font.sysfont("comicsansms", 75)  #sprites  img_button_start = pygame.image.load('sprites/buttons/button_start.png') img_button_options = pygame.image.load('sprites/buttons/button_options.png')  gamedisplay.fill(white) pygame.display.update()   class button(pygame.sprite.sprite):     def __init__(self, image, buttonx, buttony):         super().__init__()          gamedisplay.blit(image, (buttonx, buttony))          pygame.display.update()          selfrect = image.get_rect()      def wasclicked(event):         if selfrect.collidepoint(event.pos):              return true  def gameintro():     buttons = pygame.sprite.group()     button_start = button(img_button_start, 27, 0)     button_options = button(img_button_options, 27, 500)     buttons.add(button_start)     buttons.add(button_options)      print(buttons)       #main game loop     running = true     while running:         event in pygame.event.get():             if event.type == pygame.mousebuttondown:                 print(event.pos)                 #check every button whether clicked                 btn in buttons:                     print('forbtninbuttons')                     if btn.wasclicked():                         print('clicked!')              if event.type == pygame.quit:                 pygame.quit() 

you haven't declared attributes class, local variables. try doing self.selfrect = image.get_rect() in initializer , in wasclicked(event) method do:

def wasclicked(self, event):     if self.selfrect.collidepoint(event.pos):          return true 

it's convention name rect variable rect though.

class button(pygame.sprite.sprite):     def __init__(self, image, buttonx, buttony):         super().__init__()         #  code doesn't make sense here. should inside game loop.         #  gamedisplay.blit(image, (buttonx, buttony))         #  pygame.display.update()          self.image = image  # it's have reference image.         self.rect = image.get_rect()      def wasclicked(self, event):         if self.rect.collidepoint(event.pos):              return true         else:             return false