python开发_thread_布朗运动
这篇blog是非常有趣的，是的，他非常有趣
下面我将给大家介绍有关python中thread来实现布朗运动的一个例子
下面是运行效果：
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代码部分：
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1 # Brownian motion -- an example of a multi-threaded Tkinter program. 2 3 from tkinter import * 4 import random 5 import threading 6 import time 7 import sys 8 9 #画布大小 10 WIDTH = 400 11 HEIGHT = 300 12 SIGMA = 10 13 BUZZ = 2 14 RADIUS = 2 15 LAMBDA = 10 16 FILL = 'red' 17 18 stop = 0 # Set when main loop exits 19 20 def particle(canvas): 21 r = RADIUS 22 x = random.gauss(WIDTH/2.0, SIGMA) 23 y = random.gauss(HEIGHT/2.0, SIGMA) 24 p = canvas.create_oval(x-r, y-r, x+r, y+r, fill=FILL) 25 while not stop: 26 dx = random.gauss(0, BUZZ) 27 dy = random.gauss(0, BUZZ) 28 dt = random.expovariate(LAMBDA) 29 try: 30 canvas.move(p, dx, dy) 31 except TclError: 32 break 33 time.sleep(dt) 34 35 def main(): 36 global stop 37 root = Tk() 38 canvas = Canvas(root, width=WIDTH, height=HEIGHT) 39 canvas.pack(fill='both', expand=1) 40 #粒子数目 41 np = 30 42 if sys.argv[1:]: 43 np = int(sys.argv[1]) 44 for i in range(np): 45 t = threading.Thread(target=particle, args=(canvas,)) 46 t.start() 47 try: 48 root.mainloop() 49 finally: 50 stop = 1 51 52 main()
更多资料：http://www.oschina.net/code/explore/Python-3.1.3/Demo/tkinter/guido/brownian.py
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