Welcome folks today in this blog post we will be building a snake and apples game in turtle library in python. All the full source code of the application is shown below.
Get Started
In order to get started you need to install the following library using the below command
pip install turtle
After installing this library you need to create an app.py file and copy paste the following code
app.py
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import turtle import time import random delay = 0.1 queue =[] #Calculate the score and high score pen = turtle.Turtle() pen.shape('square') pen.penup() pen.speed(0) pen.color('White') pen.hideturtle() pen.goto(0,210) pen.write("Score: 0 High score: 0 ",align='center',font=('Arial',25,'bold')) # First , we create the snake window window = turtle.Screen() window.bgcolor('Black') window.title('Snake_Game by Mariam Mostafa') window.setup(width=600,height=500) window.tracer(0) #Next, we will create the snake head Snake_Head = turtle.Turtle() Snake_Head.speed(0) Snake_Head.shape('circle') Snake_Head.color('Beige') Snake_Head.penup() Snake_Head.goto(0,0) # by default it is in the center of the screen Snake_Head.direction ='stop' #Next, we will create the snake food Snake_Food = turtle.Turtle() Snake_Food.speed(0) Snake_Food.shape('circle') Snake_Food.color('green') Snake_Food.penup() Snake_Food.goto(0,150) # by default it is in the center of the screen ######################################################################## # Then , we will create all functions that we need to make snake move def Move_Snake(): if Snake_Head.direction == 'up': y = Snake_Head.ycor() Snake_Head.sety(y + 10) if Snake_Head.direction == 'down': y = Snake_Head.ycor() Snake_Head.sety(y - 10) if Snake_Head.direction == 'left': x = Snake_Head.xcor() Snake_Head.setx(x - 10) if Snake_Head.direction == 'right': x = Snake_Head.xcor() Snake_Head.setx(x + 10) def go_up(): Snake_Head.direction = 'up' def go_down(): Snake_Head.direction = 'down' def go_left(): Snake_Head.direction = 'left' def go_right(): Snake_Head.direction = 'right' def Food_Collision(): if Snake_Head.distance( Snake_Food) < 15: # I choose 10 or 15 based on the incremental that we use to make the snakehead move Snake_Food.goto(random.randint(-290, 290), random.randint(-249, 249)) """ here we use random numbers in order to move the snake food. that range because of the width and the height of the screen """ Snake_body = turtle.Turtle() # after eating the food the snake became bigger so i create one more turtle and add all in list Snake_body.speed(0) Snake_body.shape('circle') Snake_body.color('yellow') Snake_body.penup() queue.append(Snake_body) return True return False def Border_Collision(): # Border collision if Snake_Head.xcor() > 290 or Snake_Head.xcor() < -290 or Snake_Head.ycor() > 249 or Snake_Head.ycor() < -249: time.sleep(1) Snake_Head.goto(0, 0) Snake_Head.direction = 'stop' for segment in queue: segment.goto(1000, 1000) queue.clear() return True return False def Body_Collision(): # body collisions for segment in queue: if segment.distance(Snake_Head) < 10: # overlapping time.sleep(1) Snake_Head.goto(0, 0) Snake_Head.direction = 'stop' for segment in queue: segment.goto(1000, 1000) queue.clear() return True return False def Add_Snake_Body(): # add body to the snake because i don't know the length so i iterate from the last one in the list for i in range(len(queue) - 1, 0, -1): if i % 5 == 0: queue[i].goto(queue[i - 1].xcor(), queue[i - 1].ycor()) queue[i].color('green') continue queue[i].goto(queue[i - 1].xcor(), queue[i - 1].ycor()) if len(queue) > 0: queue[0].goto(Snake_Head.xcor(), Snake_Head.ycor()) # after that , i want to direct the snake head by using the keyboard so i should use keyboard bindings so we use listen function in order to listen to the keypress window.listen() window.onkeypress(go_up, 'Up') window.onkeypress(go_down, 'Down') window.onkeypress(go_left, 'Left') window.onkeypress(go_right, 'Right') #################################################################################### # Game loop score = 0 High_Score = 0 while True: window.update() Move_Snake() if Food_Collision(): score += 10 High_Score += 10 if score > High_Score: High_Score = score pen.clear() pen.write('Score:{} High score:{} '.format(score, High_Score), align='center', font=('Arial', 25, 'bold')) if Body_Collision() or Border_Collision(): score = 0 pen.clear() pen.write('Score:{} High score:{} '.format(score, High_Score), align='center', font=('Arial', 25, 'bold')) time.sleep(delay) Add_Snake_Body() # this keep the window open window.mainloop() |
And now if you execute the python script by typing the below command as shown below
python app.py
