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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# 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()

更多资料：http://www.oschina.net/code/explore/Python-3.1.3/Demo/tkinter/guido/brownian.py

 

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