gistfile1.py

import urllib2
import json
import time
import pylab
import matplotlib.pyplot as plt
import matplotlib.animation as animation



def update_line(data):
	x, price = data
	xdata.append(x) 
	ydata.append(price)
	l.set_data(xdata,ydata)
	print  xdata, ydata
	return l,



def get_data():
	counter = 0
	while True:
		f = urllib2.urlopen('http://data.mtgox.com/api/1/BTCPLN/depth/fetch')
		json_string = f.read()
		parsed_json = json.loads(json_string)
		print counter
		counter = counter + 1
		yield counter, parsed_json['return']['asks'][0]['price']
		
xdata, ydata = [], []
fig1 = plt.figure()
l, = plt.plot([], [])

line_ani = animation.FuncAnimation(fig1, update_line, get_data,
    interval=1000, blit=True)


plt.show()