How to create your first Python game

At first, you should require the python development environment so let's get started.

The first step is to install the latest version of Python 3 on your computer. after that install an IDE  Pycharm it is very helpful to run your code in Python now you have installed the required Softwares on your computer next step is to configure the pycharm for your game development so go through the following steps

• create a new python file on your project - Main.py
• then click on FILE
• 
• then click on the settings
• after that click on Python Interpreter
• 
• then click on add option and search for pygame and install it.
• congrats you are ready to code a game 

now just paste the given code in your main file

import pygame
import random
import math
from pygame import mixer

# initializationpygame.init()
# creating the screenscreen = pygame.display.set_mode((800, 600))
# Backgroundbackground = pygame.image.load('space2.jpg')

# background soundmixer.music.load('back.mp3')
mixer.music.play(-1)

# Title and Iconpygame.display.set_caption("Space Invader")
icon = pygame.image.load('gaming.png')
pygame.display.set_icon(icon)

# playerplayerImg = pygame.image.load('player2.png')
playerX = 370playerY = 480playerX_change = 0
# EnemyenemyImg = []
enemyX = []
enemyY = []
enemyX_change = []
enemyY_change = []
num_of_enemies = 6
for i in range(num_of_enemies):
    enemyImg.append(pygame.image.load('signs.png'))
    enemyX.append(random.randint(0, 736))
    enemyY.append(random.randint(50, 150))
    enemyX_change.append(3)
    enemyY_change.append(40)

# bullet
# Ready means you can't see the bullet# fire means bullet moves in the upward directionbulletImg = pygame.image.load('bullet.png')
bulletX = 0bulletY = 480bulletX_change = 0bulletY_change = 10bullet_state = "Ready"
# Scorescore_value = 0font = pygame.font.Font('freesansbold.ttf', 32)

textX = 10textY = 10
# Game over
over_font = pygame.font.Font('freesansbold.ttf', 64)


def show_score(x, y):
    score = font.render("Score: " + str(score_value), True, (255, 255, 255))
    screen.blit(score, (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 fire_bullet(x, y):
    global bullet_state
    bullet_state = "Fire"    screen.blit(bulletImg, (x + 48, y + 10))


def iscollision(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

# Game looprunning = Truewhile running:

    screen.fill((0, 255, 255))

    screen.blit(background, (0, 0))

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        # If keystroke is pressed check weather it is left or right        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                playerX_change = -4            if event.key == pygame.K_RIGHT:
                playerX_change = 4
            if event.key == pygame.K_SPACE:
                if bullet_state is "Ready":
                    bullet_sound = mixer.Sound('shot.wav')
                    bullet_sound.play()
                    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
    # Checking for boundary for player    playerX += playerX_change

    if playerX <= 0:
        playerX = 0    elif playerX >= 673:
        playerX = 673    # Checking for boundary for enemy
    # enemy movement    for i in range(num_of_enemies):
        # game over        if enemyY[i] > 440:
            for j in range(num_of_enemies):
                enemyY[j] = 2000            game_over_text()
            break
        enemyX[i] += enemyX_change[i]
        if enemyX[i] <= 0:
            enemyX_change[i] = 3            enemyY[i] += enemyY_change[i]
        elif enemyX[i] >= 736:
            enemyX_change[i] = -3            enemyY[i] += enemyY_change[i]

        collision = iscollision(enemyX[i], enemyY[i], bulletX, bulletY)
        if collision:
            blast_sound = mixer.Sound('blast.wav')
            blast_sound.play()
            bulletY = 480            bullet_state = "Ready"            score_value += 1            enemyX[i] = random.randint(0, 736)
            enemyY[i] = random.randint(50, 150)

        enemy(enemyX[i], enemyY[i], i)

    # Bullet movement    if bulletY <= 0:
        bulletY = 480        bullet_state = "Ready"    if bullet_state is "Fire":
        fire_bullet(bulletX, bulletY)
        bulletY -= bulletY_change

    player(playerX, playerY)
    show_score(textX, textY)
    pygame.display.update()

now you have to add some files in your project

for background, a png file of 800 X 600 and name it as space2

for the icon, a png file of 32 X 32 and name it gamming

for a player, a png file of 64 X 64 and name it player2

for an enemy, a png file of 32 X 32 and name it signs

 for a bullet, a png file of 32 X 32 and name it bullet

for background music, an mp3 file, and name it back

for shootout sound, a wav  file and name it shot

for blast sound effect, a wav file and name it blast

you can download the above files from google.

now click on the run button your game is ready and you can play it 

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