Pygame code very slow despite all troubleshooting - python-3.x

Question

so i wrote this game from a pygame intro tutorial, added menus and all to modify it. whenever i run the game on my MBP 17, it runs extremely slow. i googled it, and tried all solutions, to no avail. also, typing in my event.unicode works extremely horribly, i have to press the same key more than once for it to register. any help is appreciated.
import sys
import pygame
import random
import math
import mysql.connector as mysql
import pygame_textinput
pygame.init()
screen = pygame.display.set_mode((800, 600))
pygame.display.set_caption('Die Alien Die')
#database requirements
msql = mysql.connect(user='root', password='7014403396', database='gamer')
cursor = msql.cursor()
#background
background = pygame.image.load('back.png').convert()
pygame.mixer.music.load('y2mate.com - Star Wars_ Sith Battle Theme Music_XS4_5xlA3Ls_320kbps.mp3')
pygame.mixer.music.play(-1)
clock = pygame.time.Clock()
#millenium falcom
playerimg = pygame.image.load('mfc.png')
playerX = 350
playerY = 480
dx = 0
dy = 0
#alien die
alienimg = []
alienX =[]
alienY =[]
adx = []
ady = []
no_of_aliens = 8
for i in range(no_of_aliens):
alienimg.append(pygame.image.load('spaceship.png'))
alienX.append(random.randint(0,735))
alienY.append(random.randint(50,250))
adx.append(0.3)
ady.append(random.randint(20,43))
#bullets
bulletimg = pygame.image.load('bullet.png')
bulletX = 0
bulletY = 480
bdx = 0
bdy = 1
visibility = False
score = 0
font=pygame.font.Font('freesansbold.ttf',32)
font2 = pygame.font.Font('freesansbold.ttf',25)
font3 = pygame.font.Font('freesansbold.ttf',22)
# Game Over
over_font = pygame.font.Font('freesansbold.ttf', 64)
click = False
def EnterUser():
texty = ''
global click
while True:
screen.fill((255, 255, 255))
textinput = pygame_textinput.TextInput()
events = pygame.event.get()
textinput.update(events)
screen.blit(textinput.get_surface(), (50, 150))
buttong = pygame.Rect(50, 330, 200, 50)
mx, my = pygame.mouse.get_pos()
pygame.draw.rect(screen, (255, 0, 0), buttong)
draw_text('enter username', font, (0, 0, 0), screen, 20, 20)
draw_text("Press Enter", font2, (0, 0, 0), screen, 50, 200)
draw_text("If you leave username blank", font2, (0, 0, 0), screen, 50, 250)
draw_text("your score wont register", font2, (0, 0, 0), screen, 50, 280)
text_surface = font.render(texty, True, (0,0,0))
screen.blit(text_surface, (50, 150))
draw_text('Lets Go', font2, (0, 0, 0), screen, 52, 340)
if buttong.collidepoint((mx, my)):
if click:
main_menu()
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
if event.type == pygame.KEYDOWN:
texty += event.unicode
if event.key == pygame.K_BACKSPACE:
texty = texty[:-1]
if event.key == pygame.K_ESCAPE:
pygame.quit()
if event.type == pygame.K_RETURN:
main_menu()
if event.type == pygame.MOUSEBUTTONDOWN:
if event.button == 1:
click = True
pygame.display.update()
def draw_text(text, font, color, surface, x, y):
textobj = font.render(text, 1, color)
textrect = textobj.get_rect()
textrect.topleft = (x, y)
surface.blit(textobj, textrect)
def player(x, y):
screen.blit(playerimg, (x, y))
def alien(x,y,i):
screen.blit(alienimg[i],(x,y))
def shoot(x,y):
global visibility
visibility = True
screen.blit(bulletimg,(x+25,y+10))
def collide(bulletX,bulletY,alienX,alienY):
distance = math.sqrt(math.pow(alienX-bulletX,2)+math.pow(alienY-bulletY,2))
if distance < 27:
return True
else:
return False
def showscore(x,y):
sscore=font.render('Score: '+str(score),True,(141,27,31))
screen.blit(sscore,(x,y))
def game_over_text():
over_text = over_font.render("GAME OVER", True, (255, 255, 255))
screen.blit(over_text, (200, 250))
fscore = score
save_score()
def save_score():
t = "INSERT INTO alien VALUES('{}', '{}')".format(texty, str(score))
#val = (texty, str(score))
cursor.execute(t)
msql.commit()
#def show_high():
def main_menu():
while True:
screen.fill((0, 0, 0))
draw_text('Main Menu', font, (255, 255, 255), screen, 20, 20)
mx, my = pygame.mouse.get_pos()
button_1 = pygame.Rect(50, 100, 200, 50)
button_2 = pygame.Rect(50, 200, 200, 50)
if button_1.collidepoint((mx, my)):
if click:
game()
if button_2.collidepoint((mx, my)):
if click:
options()
pygame.draw.rect(screen, (255, 0, 0), button_1)
pygame.draw.rect(screen, (255, 0, 0), button_2)
draw_text('Alien Destroyer', font2, (0,0,0), screen, 52, 110)
draw_text('Show high scores', font3, (0,0,0), screen, 52, 206)
draw_text('for Alien Destroyer', font3, (0,0,0), screen, 52, 230)
click = False
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
pygame.quit()
if event.type == pygame.MOUSEBUTTONDOWN:
if event.button == 1:
click = True
pygame.display.update()
# game loop
def game():
global dx
global dy
global adx
global ady
global bdx
global bdy
global playerY
global playerX
global alienX
global alienY
global bulletY
global bulletX
global visibility
global score
running = True
while running:
clock.tick(60)
screen.fill((0, 0, 0))
screen.blit(background, (0, 0))
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
dx = -1
if event.key == pygame.K_RIGHT:
dx = 1
if event.key == pygame.K_SPACE:
pygame.mixer.music.load('laser.wav')
pygame.mixer.music.play()
bulletX = playerX
shoot(bulletX, bulletY)
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
dx = 0
playerX += dx
if playerX <= 0:
playerX = 0
elif playerX >= 736:
playerX = 736
for i in range(no_of_aliens):
if alienY[i] > 440:
for j in range(no_of_aliens):
alienY[j] = 2000
game_over_text()
break
alienX[i] += adx[i]
if alienX[i] <= 0:
adx[i] = 0.3
alienY[i] += ady[i]
elif alienX[i] >= 736:
adx[i] = -0.3
alienY[i] += ady[i]
death = collide(bulletX, bulletY, alienX[i], alienY[i])
if death:
pygame.mixer.music.load('explosion.wav')
pygame.mixer.music.play()
bulletY = 480
visibility = False
score += 1
alienX[i] = random.randint(0, 735)
alienY[i] = random.randint(30, 130)
alien(alienX[i], alienY[i], i)
if bulletY <= 0:
bulletY = 480
visibility = False
if visibility is True:
shoot(bulletX, bulletY)
bulletY -= bdy
showscore(10, 10)
player(playerX, playerY)
pygame.display.update()
EnterUser()

Answer 1

The problem is that you are calling pygame.event.get() multiple times (Lines: 89, 174, 208). This causes different events queues to disagree and causes problems. There is an easy fix.
In you main application loop, call pygame.event.get() once.
def game:
while running:
#omitted code
events = pygame.event.get()
for event in events:
#...
Then, you can pass events variable to other functions as an argument.