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The main content of this article is to explain "what is the method of reconstructing keyboard and mouse response in Python alien invasion games?" interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what is the method of reconstructing keyboard and mouse response in Python alien invasion games?"

Usage analysis

In large projects, you often need to ReFactor existing code before adding new code. Refactoring is designed to simplify the structure of existing code and make it easier to extend. In this section, we will create a new module called game_functions, which will store a large number of functions that make the game "alien invasion" run. By creating the module game_functions, you can avoid that the alien_invasion.py is too long and make its logic easier to understand.

Put check_events () and update_screen in a module called game_functions

Code example

# =

# function: game_functions class # author: brother python

# time: 2020-7-5

# Wechat official account: DJXY00001

# Wechat name: Python Promotion Class

# Version:1.0

# = import sysimport pygamedef check_events (): "respond to buttons and mouse events" for event in pygame.event.get (): if event.type = = pygame.QUIT: sys.exit () def update_screen (ai_settings, screen, ship): "" updates the image on the screen And switch to the new screen "" # redraw the screen screen.fill (ai_settings.bg_color) ship.blitme () # so that the recently drawn screen is visible to pygame.display.flip ()

The sys and pygame to be used by the event checking loop are imported into this module. Currently, the function check_events () does not require any formal parameters, and its function body copies the event loop of alien_invasion.py.

Let's modify alien_invasion.py to import the module game_functions and replace the event loop with a call to the function check_events (). Replace the screen update code with the update_screen function.

# =

# function: alien_invasion class # author: brother python

# time: 2020-7-5

# Wechat official account: DJXY00001

# Wechat name: Python Promotion Class

# Version:1.0

# = import pygamefrom settings import Settingsfrom ship import Shipimport game_functions as gfdef run_game ():-- snip-- # start the game's main cycle while True: gf.check_events () gf.update_screen (ai_settings, screen, ship)

Where-snip-- represents the continuation of the previous section.

In the main program file, you no longer need to import sys directly, because it is currently only used in the module game_functions. For the sake of simplicity, we assigned the alias gf to the imported module game_functions.

Code run output:

We only wanted to use one file at first, so we didn't introduce the module game_functions right away. This allows you to understand the actual development process: write the code as simple as possible at first and ReFactor as the project becomes more and more complex.

At this point, I believe you have a deeper understanding of "what is the method of reconstructing keyboard and mouse response in Python alien invasion games?" you might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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