Problem creating new enemies when player levels up - pygame

Question

i'm working on a simple clone of Space Invaders for an University project. The idea is that when the players levels up, the amount of enemies increase, but when i try to do it, the enemies creates infinitly while the stablished condition is true. I can't dettect the problem, so if one of you can help me, i'll apreciate it.
import random
import csv
import operator
import pygame
import time
from pygame import mixer
# Intialize the pygame
pygame.init()
# create the screen
screen = pygame.display.set_mode((800, 600))
# Background
background = pygame.image.load('background.png')
# Sound
mixer.music.load("background.wav")
mixer.music.play(-1)
#Reloj
clock = pygame.time.Clock()
# Caption and Icon
pygame.display.set_caption("Space Invader")
icon = pygame.image.load('ufo.png')
pygame.display.set_icon(icon)
# Score
score_value = 0
level_value = 1
level_up_value = ""
font = pygame.font.Font('freesansbold.ttf', 20)
game_over = False
high_scores = []
names = []
with open('high_scores.csv') as csvfile:
reader = csv.reader(csvfile)
sortedlist = sorted(reader, key=operator.itemgetter(1), reverse=True)
for i in sortedlist:
names.append(i[0])
high_scores.append(i[1])
scoreX = 10
scoreY = 10
level_textX = 10
level_textY = 80
levelX = 10
levelY = 40
# Game Over
over_font = pygame.font.Font('freesansbold.ttf', 64)
menu_font = pygame.font.Font('freesansbold.ttf', 48)
scores_font = pygame.font.Font('freesansbold.ttf', 45)
#Número de vidas
num_vidas = 3
font = pygame.font.Font('freesansbold.ttf', 32)
vidasX = 650
vidasY = 10
# Player
playerImg = pygame.image.load('player.png')
playerX = 370
playerY = 480
playerX_change = 0
# Enemy
enemyImg = []
bichoImg = []
meteoroImg = []
enemyX = []
enemyY = []
enemyY_change = []
bichoX = []
bichoY = []
bichoY_change = []
meteoroX = []
meteoroY = []
meteoroY_change = []
num_of_enemies_10 = 5
num_of_enemies_20 = 4
num_of_enemies_30 = 3
for i in range(num_of_enemies_10):
enemyImg.append(pygame.image.load('enemy.png'))
enemyX.append(random.randint(0, 736))
enemyY.append(random.randint(50, 150))
enemyY_change.append(0.5)
for i in range(num_of_enemies_20):
bichoImg.append(pygame.image.load('bicho.png'))
bichoX.append(random.randint(0, 736))
bichoY.append(random.randint(10, 120))
bichoY_change.append(0.5)
for i in range(num_of_enemies_30):
meteoroImg.append(pygame.image.load('meteoro.png'))
meteoroX.append(random.randint(0, 736))
meteoroY.append(random.randint(0, 150))
meteoroY_change.append(0.5)
# Bullet
# Ready - You can't see the bullet on the screen
# Fire - The bullet is currently moving
bulletImg = pygame.image.load('bullet.png')
bulletX = 0
bulletY = 480
bulletX_change = 0
bulletY_change = 10
bullet_state = "ready"
def show_score(x, y):
score = font.render("Score : " + str(score_value), True, (255, 255, 255))
screen.blit(score, (x, y))
def show_level(x, y):
level = font.render("Level: " + str(level_value), True, (255, 255, 255))
screen.blit(level, (x, y))
def level_up_text(x, y):
level_text = font.render(level_up_value, True, (255, 255, 0))
screen.blit(level_text, (level_textX, level_textY))
def show_vidas(x, y):
vidas = font.render("Vidas : " + str(num_vidas), True, (255, 255, 255))
screen.blit(vidas, (x, y))
def game_over_text():
over_text = over_font.render("GAME OVER", True, (255, 255, 255))
screen.blit(over_text, (200, 250))
def player(x, y):
screen.blit(playerImg, (x, y))
def enemy(x, y, i):
screen.blit(enemyImg[i], (x, y))
def bicho(x, y, i):
screen.blit(bichoImg[i], (x, y))
def meteoro(x, y, i):
screen.blit(meteoroImg[i], (x, y))
def fire_bullet(x, y):
global bullet_state
bullet_state = "fire"
screen.blit(bulletImg, (x + 16, y + 10))
#Colisiones para cada tipo de enemigo
def isCollision1(enemyX, enemyY, bulletX, bulletY):
distance = math.sqrt(math.pow(enemyX - bulletX, 2) + (math.pow(enemyY - bulletY, 2)))
if distance < 27:
return True
else:
return False
def isCollision2(bichoX, bichoY, bulletX, bulletY):
distance = math.sqrt(math.pow(bichoX - bulletX, 2) + (math.pow(bichoY - bulletY, 2)))
if distance < 27:
return True
else:
return False
def isCollision3(meteoroX, meteoroY, bulletX, bulletY):
distance = math.sqrt(math.pow(meteoroX - bulletX, 2) + (math.pow(meteoroY - bulletY, 2)))
if distance < 27:
return True
else:
return False
# Pause Loop
def show_pause():
paused = True
while paused:
# RGB = Red, Green, Blue
screen.fill((0, 0, 0))
# Background Image
screen.blit(background, (0, 0))
pause_title = menu_font.render("PAUSED", True, (255, 255, 0))
pauseRect = pause_title.get_rect()
pauseRect.centerx = screen.get_rect().centerx
pauseRect.centery = screen.get_rect().centery - 50
screen.blit(pause_title, pauseRect)
high_title = menu_font.render("HIGH SCORES", True, (255, 255, 255))
highRect = high_title.get_rect()
highRect.centerx = screen.get_rect().centerx
highRect.centery = screen.get_rect().centery + 50
screen.blit(high_title, highRect)
for event in pygame.event.get():
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
paused = False
break
if event.type == pygame.MOUSEBUTTONDOWN:
mpos = pygame.mouse.get_pos()
if highRect.collidepoint(mpos):
show_high_scores_menu()
break
pygame.display.update()
# High Scores Loop
def show_high_scores_menu():
high_scores_menu = True
global high_scores, names
high_scores.clear()
names.clear()
with open('high_scores.csv') as csvfile:
reader = csv.reader(csvfile)
sortedlist = sorted(reader, key=operator.itemgetter(1), reverse=True)
for i in sortedlist:
names.append(i[0])
high_scores.append(i[1])
while high_scores_menu:
# RGB = Red, Green, Blue
screen.fill((0, 0, 0))
# Background Image
screen.blit(background, (0, 0))
high_title = menu_font.render("HIGH SCORES", True, (255, 255, 0))
highRect = high_title.get_rect()
highRect.centerx = screen.get_rect().centerx
highRect.centery = 100
screen.blit(high_title, highRect)
score1 = scores_font.render(names[0] + " : " + str(high_scores[0]), True, (255, 255, 255))
score1Rect = score1.get_rect()
score1Rect.centerx = screen.get_rect().centerx
score1Rect.centery = 250
screen.blit(score1, score1Rect)
score2 = scores_font.render(names[1] + " : " + str(high_scores[1]), True, (255, 255, 255))
score2Rect = score1.get_rect()
score2Rect.centerx = screen.get_rect().centerx
score2Rect.centery = 300
screen.blit(score2, score2Rect)
score3 = scores_font.render(names[2] + " : " + str(high_scores[2]), True, (255, 255, 255))
score3Rect = score3.get_rect()
score3Rect.centerx = screen.get_rect().centerx
score3Rect.centery = 350
screen.blit(score3, score3Rect)
score4 = scores_font.render(names[3] + " : " + str(high_scores[3]), True, (255, 255, 255))
score4Rect = score4.get_rect()
score4Rect.centerx = screen.get_rect().centerx
score4Rect.centery = 400
screen.blit(score4, score4Rect)
score5 = scores_font.render(names[4] + " : " + str(high_scores[4]), True, (255, 255, 255))
score5Rect = score1.get_rect()
score5Rect.centerx = screen.get_rect().centerx
score5Rect.centery = 450
screen.blit(score5, score5Rect)
for event in pygame.event.get():
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
high_scores_menu = False
show_pause()
break
pygame.display.update()
def save_high_scores():
# RGB = Red, Green, Blue
screen.fill((0, 0, 0))
# Background Image
screen.blit(background, (0, 0))
name = ""
while len(name) < 3:
for event in pygame.event.get():
if event.type == pygame.KEYDOWN:
if event.unicode.isalpha():
name += event.unicode
elif event.key == pygame.K_BACKSPACE:
name = name[:-1]
name = name.upper()
screen.fill((0, 0, 0))
screen.blit(background, (0, 0))
high_title = menu_font.render("High Score!", True, (255, 255, 0))
highRect = high_title.get_rect()
highRect.centerx = screen.get_rect().centerx
highRect.centery = 100
screen.blit(high_title, highRect)
inpt = font.render("Enter a 3-letter name", True, (255, 255, 255))
inptRect = inpt.get_rect()
inptRect.centerx = screen.get_rect().centerx
inptRect.centery = 200
screen.blit(inpt, inptRect)
namedisplay = menu_font.render(name, True, (255, 255, 255))
namedisplayRect = namedisplay.get_rect()
namedisplayRect.center = screen.get_rect().center
screen.blit(namedisplay, namedisplayRect)
pygame.display.update()
#replace lowest
lowest = high_scores[0]
lowest_index = 0
for i in range(len(high_scores)):
if high_scores[i] <= lowest:
lowest = high_scores[i]
lowest_index = i
high_scores[lowest_index] = score_value
names[lowest_index] = name
with open('high_scores.csv', 'w',newline='') as csvfile:
writer = csv.writer(csvfile)
for i in range(len(names)):
writer.writerow([str(names[i]), str(high_scores[i])])
show_high_scores_menu()
BLACK = (0, 0, 0)
#Agregar imágenes para explosión
explosión_anim = []
for i in range(9):
file = "Explosión/Explosión 0{}.png".format(i)
img = pygame.image.load(file).convert()
img.set_colorkey(BLACK)
img_scale = pygame.transform.scale(img, (70, 70))
explosión_anim.append (img_scale)
def explosión1():
image = explosión_anim[0]
center = image.get_rect()
frame = 0
last_update = pygame.time.get_ticks()
frame_rate = 50 #Velocidad de la explosión
screen.blit(image, (enemyX[i], enemyY[i]))
now = pygame.time.get_ticks()
if now - last_update > frame_rate:
last_update = now
frame += 1
if frame == len(explosión_anim):
kill()
else:
center = rect.center
image = explosión_anim[frame]
rect = image.get_rect()
rect.center = center
def explosión2():
image = explosión_anim[0]
center = image.get_rect()
frame = 0
last_update = pygame.time.get_ticks()
frame_rate = 50 #Velocidad de la explosión
screen.blit(image, (bichoX[i], bichoY[i]))
now = pygame.time.get_ticks()
if now - last_update > frame_rate:
last_update = now
frame += 1
if frame == len(explosión_anim):
kill()
else:
center = rect.center
image = explosión_anim[frame]
rect = image.get_rect()
rect.center = center
def explosión3():
image = explosión_anim[0]
center = image.get_rect()
frame = 0
last_update = pygame.time.get_ticks()
frame_rate = 50 #Velocidad de la explosión
screen.blit(image, (meteoroX[i], meteoroY[i]))
now = pygame.time.get_ticks()
if now - last_update > frame_rate:
last_update = now
frame += 1
if frame == len(explosión_anim):
kill()
else:
center = rect.center
image = explosión_anim[frame]
rect = image.get_rect()
rect.center = center
# Game Loop
en_partida = True
while en_partida:
clock.tick(60)
en_final = False
# RGB = Red, Green, Blue
screen.fill((0, 0, 0))
# Background Image
screen.blit(background, (0, 0))
# if player levels up
if score_value < 40:
level_value = 1
elif score_value <= 80:
level_value = 2
elif score_value <= 120:
level_value = 3
elif score_value <= 160:
level_value = 4
if (score_value >= 40 and score_value <= 42):
level_up_value = "LEVEL UP!"
elif (score_value >= 80 and score_value <= 82):
level_up_value = "LEVEL UP!"
elif (score_value >= 120 and score_value <= 122):
level_up_value = "LEVEL UP!"
else:
level_up_value = ""
for event in pygame.event.get():
if event.type == pygame.QUIT:
en_partida = False
# if keystroke is pressed check whether its right or left
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
playerX_change = -5
if event.key == pygame.K_RIGHT:
playerX_change = 5
if event.key == pygame.K_SPACE:
if bullet_state == "ready":
bulletSound = mixer.Sound("laser.wav")
bulletSound.play()
# Get the current x cordinate of the spaceship
bulletX = playerX
fire_bullet(bulletX, bulletY)
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
playerX_change = 0
# 5 = 5 + -0.1 -> 5 = 5 - 0.1
# 5 = 5 + 0.1
playerX += playerX_change
if playerX <= 0:
playerX = 0
elif playerX >= 736:
playerX = 736
# Enemy Movement
for i in range(num_of_enemies_10):
# Game Over
enemyY[i] += enemyY_change[i]
if enemyY[i] > 440:
for j in range(num_of_enemies_10):
enemyY[j] = 2000
game_over_text()
break
for i in range(num_of_enemies_20):
# Game Over
bichoY[i] += bichoY_change[i]
if bichoY[i] > 440:
for j in range(num_of_enemies_20):
bichoY[j] = 2000
game_over_text()
break
for i in range(num_of_enemies_30):
# Game Over
meteoroY[i] += meteoroY_change[i]
if meteoroY[i] > 440:
for j in range(num_of_enemies_30):
meteoroY[j] = 2000
game_over_text()
break
# Collision
collision1 = isCollision1(enemyX[i], enemyY[i], bulletX, bulletY)
collision2 = isCollision2(bichoX[i], bichoY[i], bulletX, bulletY)
collision3 = isCollision3(meteoroX[i], meteoroY[i], bulletX, bulletY)
enemy(enemyX[i], enemyY[i], i)
bicho(bichoX[i], bichoY[i], i)
meteoro(meteoroX[i], meteoroY[i], i)
if collision1:
explosionSound = mixer.Sound("explosion.wav")
explosionSound.play()
explosión1()
bulletY = 480
bullet_state = "ready"
score_value += 10
num_of_enemies_10 -= 1
if collision2:
explosionSound = mixer.Sound("explosion.wav")
explosionSound.play()
explosión2()
bulletY = 480
bullet_state = "ready"
score_value += 20
num_of_enemies_20 -= 1
if collision3:
explosionSound = mixer.Sound("explosion.wav")
explosionSound.play()
explosión3()
bulletY = 480
bullet_state = "ready"
score_value += 30
num_of_enemies_30 -= 1
#Aumento de enemigos por nivel
enemy_created = False
flag = False
if(level_value == 2 and flag == True):
flag = True
enemyX[i] = random.randint(0,736)
enemyY[i] = random.randint(50,150)
enemy(enemyX[i], enemyY[i], i)
enemy_created = True
# Bullet Movement
if bulletY <= 0:
bulletY = 480
bullet_state = "ready"
if bullet_state == "fire":
fire_bullet(bulletX, bulletY)
bulletY -= bulletY_change
player(playerX, playerY)
show_score(scoreX, scoreY)
show_level(levelX, levelY)
level_up_text(levelX + 100, levelY)
show_vidas(vidasX, vidasY)
pygame.display.update()
pygame.quit()

Answer 1

Set the flag before the game loop:
# Game Loop
flag = True # set flag here
en_partida = True
while en_partida:
clock.tick(60)
....................
#Aumento de enemigos por nivel
enemy_created = False
if(level_value == 2 and flag == True): # check flag
flag = False # reset flag
enemyX[i] = random.randint(0,736)
enemyY[i] = random.randint(50,150)
enemy(enemyX[i], enemyY[i], i)
enemy_created = True