Python matplotlib不'；在x轴上不显示实时

我通过Paramiko从远程设备收集的数据提供以下动画。 如果我理解动画间隔的概念，值为1000秒，动画应该每1000毫秒更新一次绘图，x轴应该以秒为单位显示实时单位

在测量动画功能和内部的不同部分后，动画功能的执行时间似乎超过1秒，而从远程设备提取inf.的动画部分占用了大部分时间

拉动功能是否需要超过1秒并不重要，最重要的是绘制的信息对应于x轴上的第二个单位

如何确保绘图在X轴上显示实时单位（在我的情况下是秒），在y轴上显示相应的y值，即使读取过程所用的时间超过了时间单位

def GetInfo(stdout):
    ...

def init():
    line.set_data(\[\], \[\])
    return line,


def animate(i):
    ### I
    tRefAnim = time.time()
    global penQ
    global halfTimer
    global tRef

    ### II
    tRefSess = time.time()
    Session = CParam(IP,login , hostname, sshpass)
    Session.SendCmd(command)
    DAMINFO = GetInfo(Session.stdout)
    print "Device Session time = " + "{0:.3f}".format(time.time()-tRefSess)

    ### III    
    tRefAnn = time.time()
    ...    
    print "Conditional annotations = " + "{0:.3f}".format(time.time()-tRefAnn)

    ### IV
    tRefDraw = time.time()

    # Collect data into x and y lists
    xdata.append(i)
    ydata.append(y)
    xmin, xmax = ax.get_xlim()
    ymin, ymax = ax.get_ylim()


    ###changing the xmax dynamically
    if i >= xmax:
        ax.set_xlim(xmin, xmax+(xmax/2))
        ax.figure.canvas.draw()

    ###changing the ymax dynamically
    if y >= ymax:
        ax.set_ylim(ymin, y+(y/10))
        ax.figure.canvas.draw()

    #line.set_data(x, y)
    line.set_data(xdata, ydata)

    print "Drawing time = " + "{0:.3f}".format(time.time()-tRefDraw)
    print "animate time = " + "{0:.3f}".format(time.time()-tRefAnim)
    return line,




# initializing parameters
...

#initial max x axis
init_xlim = 5
init_ylim = 3500

# First set up the figure, the axis, and the plot element we want to animate
fig = plt.figure()
ax = plt.axes(xlim=(0, init_xlim), ylim=(0, init_ylim))
ax.grid()
line, = ax.plot(\[\], \[\], lw=2)
#x = np.linspace(4, 5, 1000)
xdata, ydata = \[\], \[\]


anim = animation.FuncAnimation(fig, animate, init_func=init,frames=2000, interval=1000, blit=False)
plt.show()][1]

测时结果

Drawing time = 0.000
animate time = 1.149
Device Session time = 1.167
Conditional annotations = 0.000
Drawing time = 0.000
animate time = 1.168
Device Session time = 1.059
Conditional annotations = 0.000
Drawing time = 0.000
animate time = 1.060
Device Session time = 1.072
Conditional annotations = 0.000
Drawing time = 0.000
animate time = 1.073
Device Session time = 1.049
Conditional annotations = 0.000
Drawing time = 0.069
animate time = 1.119
Device Session time = 1.155
Conditional annotations = 0.000
Drawing time = 0.000
animate time = 1.156

---

我设法以+/-300毫秒的精度得到了显示时间的曲线图

• 我将animation.FuncAnimationinterval参数设置为1500毫秒 略大于动画功能所需的时间（约1200毫秒）
• 我使用全局变量作为时间参考

但是，很明显，这是一个解决办法。 我愿意接受任何其他建议