Pygame. Draw. Line

import tracebackimport mathimport pygamefrom pygame.locals import *pygame.display.init()pygame.font.init()sizes = {    "screen" : ( 300, 480 )}colors = {    "line" : ( 255, 255, 255 ),    "rect" : ( 100, 100, 100 ),    "circle" : ( 100, 100, 100 ),    "border" : ( 52, 135, 184 ),    "background" : ( 255, 255, 255 )}screen = pygame.display.set_mode( sizes["screen"], 0, 32 )def cin():    for e in pygame.event.get():        mouse_pos = pygame.mouse.get_pos()        print mouse_pos        if e.type == KEYDOWN:            if e.key == K_ESCAPE:                return False    return True            def draw():    screen.fill( colors["background"] )    ### 1    pygame.draw.line( screen,                      colors["border"],                      ( 0, 0 ),                      ( 0, sizes["screen"][1] ),                      10 )    pygame.draw.line( screen,                      colors["line"],                      ( 0, 0 ),                      ( 0, sizes["screen"][1] ),                      1 )    ### 2    pygame.draw.line( screen,                      colors["border"],                      ( 100, 0 ),                      ( 100, 300 ),                      10 )    pygame.draw.line( screen,                      colors["line"],                      ( 100, 0 ),                      ( 100, 300 ),                      1 )    ### 3    pygame.draw.line( screen,                      colors["border"],                      ( 200, 100 ),                      ( 200, -100 ),                      10 )    pygame.draw.line( screen,                      colors["line"],                      ( 200, 100 ),                      ( 200, -100 ),                      1 )    ### 4    pygame.draw.line( screen,                      colors["border"],                      ( sizes["screen"][0], 0 ),                      ( sizes["screen"][0], sizes["screen"][1] ),                      10 )    pygame.draw.line( screen,                      ( 255, 255, 255 ),                      ( sizes["screen"][0], 0 ),                      ( sizes["screen"][0], sizes["screen"][1] ),                      1 )    ### 5    pygame.draw.circle( screen, colors["circle"], ( 100, 100 ), 50 )    pygame.draw.arc( screen, colors["circle"], ( 150, 150, 100, 100 ), 0, math.pi, 2 )    ### 6    X = 10 / 2 + 1    DX = 100 - ( ( ( 10 / 2 ) + 1 ) + ( ( 10 / 2 ) - 1 ) )    pygame.draw.rect( screen,                      colors["rect"],                      ( X, 200, DX, 50 ) )    pygame.display.update()def prepare( func ):    def _pre():        pygame.event.set_grab( True )        func()        pygame.event.set_grab( False )        pygame.quit()    return _pre@preparedef main():    while True:        if not cin():            break        draw()                    if __name__ == '__main__':    try:        main()    except:        traceback.print_exc()        pygame.quit()        input()            

### 2 the left and right sides of blue are different in width, ### 1 and ### 3 are different in width

==> First, color the line segments on the right and then on the left. Therefore, the left and right lengths are respectively width/2-1, width/2 + 1.

### 5

==> Pygame is really ugly to draw an arc.

### 6 if you want to fill the rectangle, calculate it first. (Even in elementary school mathematics, it is difficult for me ....)

Pygame. Draw. Line