python使用matplotlib.pyplot绘制动态图

# -*- coding: utf-8 -*-   

import numpy as np  
import math
import matplotlib.pyplot as plt
import matplotlib.animation as antt

fig = plt.figure()
fig.handle=False

img = fig.add_subplot(111)

x=[]
y=[]
for i in range(0,100):
    x.append(i/100.0)
    y.append(math.sin(i/100.0))

#a, = img.plot(np.array(x),'green')  

def dtt(data):
    global x,y
    for i in range(0,100):
        y[i]=math.sin(x[i])
    a,=img.plot(np.array(x),np.array(y),'green')
    #a.set_ydata(np.array(y))  
    return a,  

def dong():  
    global x
    while True:
        for i in range(0,100):
            x[i]+=0.5
        yield np.array(x)

  

gif = antt.FuncAnimation(fig, dtt, dong, interval=10)

plt.show()
gif.save("picture.gif",writer="pillow",fps=3000)