晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Directory :  /usr/lib64/python2.7/Demo/tkinter/matt/

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Current File : //usr/lib64/python2.7/Demo/tkinter/matt/pong-demo-1.py
from Tkinter import *

import string


class Pong(Frame):
    def createWidgets(self):
        self.QUIT = Button(self, text='QUIT', foreground='red',
                           command=self.quit)
        self.QUIT.pack(side=LEFT, fill=BOTH)

        ## The playing field
        self.draw = Canvas(self, width="5i", height="5i")

        ## The speed control for the ball
        self.speed = Scale(self, orient=HORIZONTAL, label="ball speed",
                           from_=-100, to=100)

        self.speed.pack(side=BOTTOM, fill=X)

        # The ball
        self.ball = self.draw.create_oval("0i", "0i", "0.10i", "0.10i",
                                          fill="red")
        self.x = 0.05
        self.y = 0.05
        self.velocity_x = 0.3
        self.velocity_y = 0.5

        self.draw.pack(side=LEFT)

    def moveBall(self, *args):
        if (self.x > 5.0) or (self.x < 0.0):
            self.velocity_x = -1.0 * self.velocity_x
        if (self.y > 5.0) or (self.y < 0.0):
            self.velocity_y = -1.0 * self.velocity_y

        deltax = (self.velocity_x * self.speed.get() / 100.0)
        deltay = (self.velocity_y * self.speed.get() / 100.0)
        self.x = self.x + deltax
        self.y = self.y + deltay

        self.draw.move(self.ball,  "%ri" % deltax, "%ri" % deltay)
        self.after(10, self.moveBall)

    def __init__(self, master=None):
        Frame.__init__(self, master)
        Pack.config(self)
        self.createWidgets()
        self.after(10, self.moveBall)


game = Pong()

game.mainloop()

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