python开发之thread实现布朗运动的方法

本文实例讲述了python开发之thread实现布朗运动的方法。分享给大家供大家参考，具体如下：

这里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：

代码部分：

# Brownian motion -- an example of a multi-threaded Tkinter program.
from tkinter import *
import random
import threading
import time
import sys
#画布大小
WIDTH = 400
HEIGHT = 300
SIGMA = 10
BUZZ = 2
RADIUS = 2
LAMBDA = 10
FILL = 'red'
stop = 0 # Set when main loop exits
def particle(canvas):
 r = RADIUS
 x = random.gauss(WIDTH/2.0, SIGMA)
 y = random.gauss(HEIGHT/2.0, SIGMA)
 p = canvas.create_oval(x-r, y-r, x+r, y+r, fill=FILL)
 while not stop:
   dx = random.gauss(0, BUZZ)
   dy = random.gauss(0, BUZZ)
   dt = random.expovariate(LAMBDA)
   try:
     canvas.move(p, dx, dy)
   except TclError:
     break
   time.sleep(dt)
def main():
 global stop
 root = Tk()
 canvas = Canvas(root, width=WIDTH, height=HEIGHT)
 canvas.pack(fill='both', expand=1)
 #粒子数目
 np = 30
 if sys.argv[1:]:
   np = int(sys.argv[1])
 for i in range(np):
   t = threading.Thread(target=particle, args=(canvas,))
   t.start()
 try:
   root.mainloop()
 finally:
   stop = 1
main()

希望本文所述对大家Python程序设计有所帮助。