从下面显示的有效Matplotlib动画代码开始，我的目标是将此动画（只是一个在屏幕上移动的圆圈）嵌入PyQT4 GUI中。

import matplotlib.pyplot as plt
from matplotlib.patches import Circle
from matplotlib import animation

fig,ax = plt.subplots()
ax.set_aspect('equal','box')
circle = Circle((0,0), 1.0)
ax.add_artist(circle)
ax.set_xlim([0,10])
ax.set_ylim([-2,2])

def animate(i):
    circle.center=(i,0)
    return circle,

anim = animation.FuncAnimation(fig,animate,frames=10,interval=100,repeat=False,blit=True)

plt.show()

我可以使用以下代码来完成此操作，但是有一个障碍：我无法直言不讳地工作。

import sys
from PyQt4 import QtGui, QtCore
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure
from matplotlib.patches import Circle
from matplotlib import animation

class Window(QtGui.QDialog): #or QtGui.QWidget ???

    def __init__(self):
        super(Window, self).__init__()
        self.fig = Figure(figsize=(5,4),dpi=100)
        self.canvas = FigureCanvas(self.fig)
        self.ax = self.fig.add_subplot(111)  # create an axis
        self.ax.hold(False)  # discards the old graph
        self.ax.set_aspect('equal','box')
        self.circle = Circle((0,0), 1.0)
        self.ax.add_artist(self.circle)
        self.ax.set_xlim([0,10])
        self.ax.set_ylim([-2,2])
        self.button = QtGui.QPushButton('Animate')
        self.button.clicked.connect(self.animate)

        # set the layout
        layout = QtGui.QVBoxLayout()
        layout.addWidget(self.canvas)
        layout.addWidget(self.button)
        self.setLayout(layout)

    def animate(self):
        self.anim = animation.FuncAnimation(self.fig,self.animate_loop,frames=10,interval=100,repeat=False,blit=False)
        self.canvas.draw()

    def animate_loop(self,i):
        self.circle.center=(i,0)
        return self.circle,

def main():

    app = QtGui.QApplication(sys.argv)
    ex = Window()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

设置时blit=True，按下Animate按钮后，出现以下错误： a.figure.canvas.restore_region（bg_cache
[a]）KeyError：matplotlib.axes._subplots.AxesSubplot对象位于0x00000000095F1D30

在寻找这个错误，我找到阻击器怎么没有在Mac上工作很多帖子，但我使用的是Windows
7，我曾尝试更换self.canvas.draw()用self.canvas.update()，但这并不工作。