Add Snake game in Python (hacktoberfest17#1009)

The classic snake game built in python via pygame

Author: apaar97

games_dev/Snake_Game/snake.py

@@ -0,0 +1,129 @@
+
+#   SNAKE GAME
+#   Author : Apaar Gupta (@apaar97)
+#   Python 3.5.2 Pygame
+
+import pygame, sys, time, random
+
+# Pygame Init
+init_status = pygame.init()
+if init_status[1]>0 :
+    print("(!) Had {0} initialising errors, exiting... ".format(init_status[1]))
+    sys.exit()
+else :
+    print("(+) Pygame initialised successfully ")
+
+# Play Surface
+size = width,height = 640,320
+playSurface = pygame.display.set_mode(size)
+pygame.display.set_caption("Snake Game")
+
+# Colors
+red = pygame.Color(255,0,0)
+green = pygame.Color(0,255,0)
+black = pygame.Color(0,0,0)
+white = pygame.Color(255,255,255)
+brown = pygame.Color(165,42,42)
+
+# FPS controller
+fpsController = pygame.time.Clock()
+
+delta = 10
+snakePos = [100,50]
+snakeBody = [[100,50],[90,50],[80,50]]
+foodPos = [400,50]
+foodSpawn = True
+direction = 'RIGHT'
+changeto = ''
+score = 0
+
+# Game Over
+def gameOver():
+    myFont = pygame.font.SysFont('monaco',72)
+    GOsurf = myFont.render("Game Over",True,red)
+    GOrect = GOsurf.get_rect()
+    GOrect.midtop = (320,25)
+    playSurface.blit(GOsurf,GOrect)
+    showScore(0)
+    pygame.display.flip()
+    time.sleep(4)
+    pygame.quit()
+    sys.exit()
+
+# Show Score
+def showScore(choice = 1):
+    SFont = pygame.font.SysFont('monaco', 32)
+    Ssurf = SFont.render("Score  :  {0}".format(score), True, black)
+    Srect = Ssurf.get_rect()
+    if choice == 1 :
+        Srect.midtop = (80, 10)
+    else :
+        Srect.midtop = (320,100)
+    playSurface.blit(Ssurf, Srect)
+
+while True :
+    for event in pygame.event.get():
+        if event.type == pygame.QUIT :
+            pygame.quit()
+            sys.exit()
+        elif event.type == pygame.KEYDOWN :
+            if event.key == pygame.K_RIGHT or event.key == pygame.K_d :
+                changeto = 'RIGHT'
+            if event.key == pygame.K_LEFT or event.key == pygame.K_a:
+                changeto = 'LEFT'
+            if event.key == pygame.K_UP or event.key == pygame.K_w:
+                changeto = 'UP'
+            if event.key == pygame.K_DOWN or event.key == pygame.K_s:
+                changeto = 'DOWN'
+            if event.key == pygame.K_ESCAPE :
+                pygame.event.post(pygame.event.Event(pygame.QUIT))
+
+    # Validate direction
+    if changeto == 'RIGHT' and direction != 'LEFT' :
+        direction = changeto
+    if changeto == 'LEFT' and direction != 'RIGHT' :
+        direction = changeto
+    if changeto == 'UP' and direction != 'DOWN' :
+        direction = changeto
+    if changeto == 'DOWN' and direction != 'UP' :
+        direction = changeto
+
+    # Update snake position
+    if direction == 'RIGHT' :
+        snakePos[0] += delta
+    if direction == 'LEFT' :
+        snakePos[0] -= delta
+    if direction == 'DOWN' :
+        snakePos[1] += delta
+    if direction == 'UP' :
+        snakePos[1] -=delta
+
+    # Snake body mechanism
+    snakeBody.insert(0,list(snakePos))
+    if snakePos == foodPos :
+        foodSpawn = False
+        score += 1
+    else :
+        snakeBody.pop()
+    if foodSpawn == False :
+        foodPos = [random.randrange(1, width//10)*delta, random.randrange(1, height//10)*delta]
+        foodSpawn = True
+
+    playSurface.fill(white)
+    for pos in snakeBody :
+        pygame.draw.rect(playSurface,green,pygame.Rect(pos[0],pos[1],delta,delta))
+    pygame.draw.rect(playSurface, brown, pygame.Rect(foodPos[0], foodPos[1], delta, delta))
+
+    # Bounds
+    if snakePos[0] >= width or snakePos[0] < 0 :
+        gameOver()
+    if snakePos[1] >= height or snakePos[1] < 0 :
+        gameOver()
+
+    # Self hit
+    for block in snakeBody[1:]:
+        if snakePos == block :
+            gameOver()
+    showScore()
+    pygame.display.flip()
+    fpsController.tick(20)