python – 捕获数据的简单UI

您可以使用pygame软件包轻松捕获键盘事件.该库是为编写游戏而构建的,但可能会为您提供keydown / keyup事件所需的功能.它还处理鼠标事件(因为它适用于游戏)具有图形/文本的功能.文档非常好,它是跨平台的.一个可能的缺点是你必须有一个“屏幕”,它必须有焦点.这是一个小例子：

import pygame

def main():
    """
    Pygame Example
    """
    pygame.init()
    screen = pygame.display.set_mode((200,200)) 
    app_running = True
    while app_running:
        # Get all key/mouse events from system.
        events = pygame.event.get()
        # Loop thru each event...
        for e in events:
            # Handle when the program is killed.
            if e.type == pygame.QUIT:
                app_running = False
                break
            # Handle key events.
            elif e.type == pygame.KEYDOWN:
                # Exit if escape is pressed.
                if e.key == pygame.K_ESCAPE:
                    app_running = False
                # Do something when the right arrow
                # is pressed.
                elif e.key == pygame.K_RIGHT:
                    print "right arrow pressed"
                # Do something when the left arrow
                # is pressed.
                elif e.key == pygame.K_LEFT:
                    print "left arrow pressed"
                # and so on ...
        # Fill the screen to blank it.
        #screen.fill(mycolor)
        # Write someting to the screen to display.
        #screen.blit(some_image,some_position)
        # Flip to display.
        #screen.flip()
    pygame.quit()

if __name__ == '__main__': 
    main()

如果您使用的是Windows版本,则可以使用msvcrt库,但事件处理不如pygame：不是事件,您必须处理原始键盘输出,而且它不太直观.以下是Robert Gillies on ActiveState的小代码片段：

import msvcrt

def funkeypress():
    """
    Waits for the user to press any key including function keys. Returns 
    the ascii code for the key or the scancode for the function key.
    """
    while 1:
        if msvcrt.kbhit():                  # Key pressed?
            a = ord(msvcrt.getch())         # get first byte of keyscan code  
            if a == 0 or a == 224:          # is it a function key?
                b = ord(msvcrt.getch())     # get next byte of key scan code
                x = a + (b*256)             # cook it.
                return x                    # return cooked scancode
            else:
                return a                    # else return ascii code