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Getting Started with Pygame

  • Difficulty Level : Basic
  • Last Updated : 30 Jun, 2021

Pygame is a free-to-use and open-source set of Python Modules.  And as the name suggests, it can be used to build games. You can code the games and then use specific commands to change it into an executable file that you can share with your friends to show them the work you have been doing.  It includes computer graphics and sound libraries designed to be used with the Python programming language.  PyGame 2.0.1 is the latest version at the time of writing this article.

Setting Up Pygame:

By default, Python doesn’t come with PyGame as an in-built Library. So we have to install it using the command prompt. Open a command prompt and type the following command: 

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pip install pygame

If you already have PyGame installed, use the following command to check the version:



pip show pygame

If your Pygame is not updated to the latest version, use the following command:

pip install pygame --upgrade

If this command shows a ModuleNotFoundError, then it is clear that pygame is not installed.

Simple PyGame Example:

Function used:

  • pygame.init(): This command is used to initiate the pygame module.
  • pygame.display.set_mode((500,500)): This command is used to make a window of desired size, (width, height). The return value is a Surface Object which is the object where we perform different graphical operations.
  • pygame.display.set_caption(title = “”): This command is used to set the title of the window/ board.
  • pygame.event.get(): This is used to empty the event queue. If we do not call this, the window messages will start to pile up and, the game will become unresponsive in the opinion of the operating system.
  • pygame.QUIT: This is used to terminate the event when we click on the close button at the corner of the window.

Python3




import pygame
  
pygame.init()
  
# CREATING CANVAS
canvas = pygame.display.set_mode((500, 500))
  
# TITLE OF CANVAS
pygame.display.set_caption("My Board")
exit = False
  
while not exit:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            exit = True
    pygame.display.update()

Output:

Add Image to the Pygame WIndow:

Blitting is the process of rendering the game object onto the surface. When we create the game object, we should render it. If we don’t render the game object, it will show the black window. In pygame there is a way to do this blitting process, i,e, blit().

It is one of the slowest operations in any game, so we need to be careful while using it as we shouldn’t blit much onto the screen in every frame.



Syntax: blit(src, dest)

src : It is the source of the image which we want to display on the screen

dest : It is the coordinates where we want our image to be displayed.

Code:

Python3




import pygame
  
pygame.init()
  
color = (255,255,255)
position = (0,0)
  
# CREATING CANVAS
canvas = pygame.display.set_mode((500,500))
  
# TITLE OF CANVAS
pygame.display.set_caption("Show Image")
  
image = pygame.image.load("Screenshot.png")
exit = False
  
while not exit:
    canvas.fill(color)
    canvas.blit(image, dest = position)
  
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            exit = True
  
    pygame.display.update()

Output:

Rectangle Box in Pygame Window:

In Pygame we use rect() method to draw rectangle boxes on the window. Pygame uses Rect objects to store and manipulate rectangular areas. It can be formed by the combination of left, top, width, and height values.

Python3




import pygame
  
pygame.init()
  
color = (255,255,255)
rect_color = (255,0,0)
  
# CREATING CANVAS
canvas = pygame.display.set_mode((500,500))
  
# TITLE OF CANVAS
pygame.display.set_caption("Show Image")
  
image = pygame.image.load("Screenshot.png")
exit = False
  
while not exit:
    canvas.fill(color)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            exit = True
  
    pygame.draw.rect(canvas, rect_color,
                     pygame.Rect(30,30,60,60))
    pygame.display.update()

Output :




My Personal Notes arrow_drop_up
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