如何使用python绘制实时正弦图？

Question

现在我画了一个基于实时的随机正弦图。然后我要把正弦图改成fft图。我在学这门课，还没有画正弦图。发出此警告。”attributeerror函数对象没有属性“T”。我会做错什么？如果你有时间，能给我一个关于fft的提示吗？”

import matplotlib.pyplot as plt
import matplotlib.animation as animation
import time
import numpy as np
from scipy.fftpack import fft, fftfreq, ifft

class Scope(object):

    def __init__(self,
                 ax,fn,
                 xmax=10, ymax =1,
                 xstart=0, ystart=-1 ):

        self.xmax = xmax 
        self.xstart = xstart 
        self.ymax = ymax 
        self.ystart = ystart 


        self.ax = ax 
        self.ax.set_xlim((self.xstart,self.xmax))
        self.ax.set_ylim((self.ystart,self.ymax))

        self.x = [0] 
        self.y = [0] 
        self.value = 0 
        self.fn = fn
        self.line, = ax.plot([],[])

        self.ti = time.time() 
        print("초기화 완료")

    def update(self, i):

        def T (self) :
            self.tempo = time.time()-self.ti
            self.ti = time.time() 
            return self.tempo

        RT = T(self)
        self.value = self.fn()
        self.y.append(self.value) 
        self.x.append( RT + self.x[-1])
        self.line.set_data(self.x,self.y)

        if self.x[-1] >= self.xstart + self.xmax :
            self.xstart = self.xstart + self.xmax/2
            self.ax.set_xlim(self.xstart,self.xstart + self.xmax)

            self.ax.figure.canvas.draw()

        return (self.line, )


fig = plt.figure() 
ax = plt.subplot(211)


def insert():
    TI = scope.update.T()
    value = np.sin(TI)
    return value 


scope = Scope(ax,insert, ystart = -1, ymax = 1)


ani = animation.FuncAnimation(fig, scope.update,interval=10,blit=True)
plt.show()