PY交易（一）使用Pygame

import pygame,sys #导入Pygame
from pygame import * #导入Pygame中的所有常量
pygame.init() #初始化Pygame
screen = pygame.display.set_mode((600,500)) #创建窗口
pygame.display.set_caption("画矩形")

pos_x = 300
pos_y = 250
vel_x = 2
vel_y = 1

while True:
    for event in pygame.event.get():
        if event.type in (QUIT,KEYDOWN):
            sys.exit()
    screen.fill((0,0,200))

    #移动矩形
    pos_x += vel_x
    pos_y += vel_y

    #让矩形在屏幕中
    if pos_x > 500 or pos_x < 0:
        vel_x = -vel_x
    if pos_y > 400 or pos_y < 0:
        vel_y = -vel_y

    #画矩形
    color = 255,255,0
    width = 0
    pos = pos_x,pos_y,100,100
    pygame.draw.rect(screen,color,pos,width)
    pygame.display.update()

import pygame,sys #导入Pygame
from pygame import * #导入Pygame中的所有常量
pygame.init() #初始化Pygame
screen = pygame.display.set_mode((600,500)) #创建窗口
pygame.display.set_caption("画直线")

while True:
    for event in pygame.event.get():
        if event.type in (QUIT,KEYDOWN):
            sys.exit()
    screen.fill((0,80,0))
    #画直线
    color = 100,255,200
    width = 8
    pygame.draw.line(screen,color,(100,100),(500,400),width)
    pygame.display.update()

import math,pygame,sys
from pygame.locals import *

pygame.init()
screen = pygame.display.set_mode((600,500))
pygame.display.set_caption("画弧线")

while True:
    for event in pygame.event.get():
        if event.type in (QUIT,KEYDOWN):
            sys.exit()
    screen.fill((0,0,200))

    #画弧线
    color = 255,0,255
    position = 200,150,200,200
    start_angle = math.radians(0)
    end_angle = math.radians(180)
    width = 8
    pygame.draw.arc(screen,color,position,start_angle,end_angle,width)

    pygame.display.update()