Time：2022-5-9

# preface

Recently, many students have asked if they can make a little game in Python, and it’s best to clarify what each paragraph is for

OK, today I’ll explain how to make a snake game with Python pyGame

It is said that the snake game is a classic arcade game launched by gremlin company in 1976. Today’s Snake game made in Python is a pixel version. Although it is simple, it can still be played

# What we need to do

1. Create game window
2. Draw greedy snakes and food
3. Snakes eat food

# Let’s start our code now. First, import the module

``````import pygame
import random
import copy``````

# 1. Create a game window

### 1.1 game initialization

``````pygame.init()
clock = pygame. time. Clock() # set the game clock
pygame. display. set_ Caption ("greedy snake - answer, source code and relevant materials can be trusted me") # initialize the title
screen = pygame. display. set_ Mode ((500, 500)) # initializes the window. The size of the window is 500``````

### 1.2 initialize the position of the snake. The length of the snake is 10, that is, the X and Y coordinates of the snake

``snake_list = [[10, 10]]``

### Initial snake direction

``````move_up = False
move_down = False
move_left = False
move_right = True``````

### 1.3 initialize the location of food

``````x = random.randint(10, 490)
y = random.randint(10, 490)
food_point = [x, y]``````

### 1.4 start the game cycle

``````running = True
while running:
#Game clock refresh rate
clock.tick(20)``````

### 1.5 the filling background is white

``screen.fill([255, 255, 255])``

### 1.6 drawing background

``````for x in range(0, 501, 10):
pygame.draw.line(screen, (195, 197, 199), (x, 0), (x, 500), 1)
pygame.draw.line(screen, (195, 197, 199), (0, x), (500, x), 1)
food_rect = pygame.draw.circle(screen, [255, 0, 0], food_point, 15, 0)``````

### 1.7 draw snake

``````snake_rect = []
for pos in snake_list:
#1.7.1 draw the body of the snake
snake_rect.append(pygame.draw.circle(screen, [255, 0, 0], pos, 5, 0))``````

# 2. Draw snake and food

### 2.1 get the length of the snake and move the body of the snake

``````pos = len(snake_list) - 1
while pos > 0:
snake_list[pos] = copy.deepcopy(snake_list[pos - 1])
pos -= 1``````

``````if move_up:
snake_list[pos][1] -= 10
if snake_list[pos][1] < 0:
snake_list[pos][1] = 500

if move_down:
snake_list[pos][1] += 10
if snake_list[pos][1] > 500:
snake_list[pos][1] = 0

if move_left:
snake_list[pos][0] -= 10
if snake_list[pos][0] < 0:
snake_list[pos][0] = 500

if move_right:
snake_list[pos][0] += 10
if snake_list[pos][0] > 500:
snake_list[pos][0] = 0``````

### 2.3 keyboard control mobile position

``````for event in pygame.event.get():
# print(event)
#Judge the pressed key
if event.type == pygame.KEYDOWN:
#Up key
if event.key == pygame.K_UP:
move_up = True
move_down = False
move_left = False
move_right = False
#Down key
if event.key == pygame.K_DOWN:
move_up = False
move_down = True
move_left = False
move_right = False
#Left key
if event.key == pygame.K_LEFT:
move_up = False
move_down = False
move_left = True
move_right = False
#Right click
if event.key == pygame.K_RIGHT:
move_up = False
move_down = False
move_left = False
move_right = True``````

### 2.4 get the length of the snake and move the body of the snake

``````pos = len(snake_list) - 1
while pos > 0:
snake_list[pos] = copy.deepcopy(snake_list[pos - 1])
pos -= 1``````

# 3. Snakes eat food

### 3.1 collision detection if the snake eats food

``````if food_rect.collidepoint(pos):
#Greedy snakes eat food
snake_list.append(food_point)
#Reset food location
food_point = [random.randint(10, 490), random.randint(10, 490)]
food_rect = pygame.draw.circle(screen, [255, 0, 0], food_point, 15, 0)
break``````

### 3.2 if the snake eats itself

``````head_rect = snake_rect[0]
count = len(snake_rect)
while count > 1: