Python游戏编程入门第二章笔记第十页结束_python游戏编程入门第二章笔记第十页结束

本文介绍了一个使用Python Pygame库创建简单窗口程序的例子。通过导入必要的Pygame模块，并初始化Pygame，设置窗口尺寸，实现了基本的窗口显示及退出事件处理。

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import pygame,sys
from pygame.locals import *

pygame.init()
DISPLAYSURF=pygame.display.set_mode((400,300))
pygame.display.set_caption("Hello World!")
while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
    pygame.display.update()

Note that when you import the pygame module you automatically import all the modules that are in the pygame module as well, such as pygame.images and pygame.mixer.mus

Line 2 is also an import statement. However, instead of the import modulename format, it uses the from modulename import * format. Normally if you want to call a function that is in a module, you must use the modulename.functionname() format before importing the module. However, with from modulename import *, you can skip the modulename.portion and simply use functionname()

The reason we use this form of import statement for pygame.locals is because pygame.locals contains several constant variables that are easy to identify as being in the
pygame.locals module without pygame.locals. in front of them.

Line 4 is the pygame.init() function call, which always needs to be called after importing the pygame module and before calling any other Pygame function. You don’t need to know what this function does, you just need to know that it needs to be called first in order for many Pygame functions to work.

Line 5 is a call to the pygame.display.set_mode() function, which returns the pygame.Surface object for the window. (Surface objects are described later in this chapter.)
Notice that we pass a tuple value of two integers to the function: (400, 300). This tuple tells the set_mode() function how wide and how high to make the window in pixels. (400, 300) will make a window with a width of 400 pixels and height of 300 pixels. Remember to pass a tuple of two integers to set_mode(), not just two integers themselves.

sys.exit() (terminates the program)

while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
    pygame.display.update()

的作用：

1. Handles events

2. Updates the game state.

3Draws the game state to the screen

1comes with自带

2module 模块

3several 一些

4framewotk 框架

5hand 支持

6input 输入

7assume 承担

8command 命令