NotImplementedError:无法删除艺术家，调用函数一次删除一个修补程序（matplotlib）

Question

我使用python2.7（Anaconda）和matplotlib来获得桌子上圆形补丁的动画（方形补丁）；我是triyng第一次使用类来获得圆的动画，这样它就从一个定义的初始点开始，然后我生成随机的位置，圆应该在其中闪烁（ini_position，然后random_position，random，and random…）。但是，当我试图移除补丁时，我可以使用函数animate我必须传递给FuncAnimation以获得随机位置上闪烁的圆，而不是在所有随机位置获得圆的多个绘图，我得到错误“NotImplementedError:cannot remove artist”。这是我的代码：

import matplotlib.pyplot as plt
import matplotlib.patches as ptc
from matplotlib import animation
import numpy as np

###############################################################################
##########################_____POLYGON_____####################################
class circle(object):    
    def __init__(self,xy,radius,color):
        self.xy=xy
        self.radius=radius
        self.color=color 

    def randPos(self,numTri,frames):
        self.numTri=numTri
        self.frames=[frames]
        for i in range (0,numTri):
            frames.append(np.random.uniform(1,9,2))

    def plotDef(self): 
        self.figure=ptc.Circle((self.xy),self.radius, 
                            facecolor = self.color, edgecolor="none")

    def addPlt(self):
        self.fig=plt.figure(1) 
        self.ax1 = self.fig.add_subplot(111,aspect='equal')       
        self.ax1.set_xlim((0,10))
        self.ax1.set_ylim((0,10))
        self.ax1.add_patch(self.figure)     

    def removePlt(self):
        self.plotDef()
        self.figure.remove()

class regularPoly(circle):
    def __init__(self,xy,vertices,radius,orient,fill,color,edge):
        super(regularPoly, self).__init__(xy,radius,color)
        self.vertices = vertices
        self.orient = orient
        self.fill = fill
        self.edge = edge

    def plotDef(self): 
        self.figure = ptc.RegularPolygon((self.xy),self.vertices,
                           self.radius, orientation=self.orient, fill=self.fill,
                           facecolor = self.color, edgecolor=self.edge)
    def addPlt(self):
        super(regularPoly,self).addPlt()

    def removePlt(self):
        self.figure.set_visible(False)


    def clearPlt(self):
        self.ax1.clear()

###############################################################################
#%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%___FIGURES_INITIALIZATION
#DESK            
deskCoord=np.array([5.0,5.0],dtype=float)               
deskNumVer=int(4)
deskRad=np.array([6.0],dtype=float)
deskOrie=np.array([0.785],dtype=float)
deskFill=False
deskCol="none"
deskEdge="black"

#HAND
ini_handCoord=np.array([5.0,1],dtype=float)
handRad=np.array([0.2],dtype=float)
handCol="y"
handPosList=[]

#ANIMATION
fig=plt.figure(1)
frames=[]
numTri=5
#%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%____________________________ 
def initDesk():
    objDesk=regularPoly(deskCoord,deskNumVer,deskRad,deskOrie,deskFill, 
                deskCol,deskEdge)

    objHand=circle(ini_handCoord,handRad,handCol)
    objHand.randPos(numTri,handPosList)

    objDesk.plotDef()
    objDesk.addPlt()

    objHand.plotDef()
    objHand.addPlt()

def animate(position):
    objHand=circle(position,handRad,handCol)
    objHand.plotDef()
    objHand.addPlt()
    objHand.removePlt()

anim = animation.FuncAnimation(fig, animate, frames=handPosList, init_func=initDesk,
                               repeat=False, interval=1000)

关于如何修理它有什么建议吗？我也试过使用self.figure.set_visible(False)但没有成功。。在