Gráficas en Tiempo Real con Python (Código)

import matplotlib.pyplot as plt
from datetime import datetime
from matplotlib import pyplot
from matplotlib.animation import FuncAnimation
from random import randrange
 
plt.style.use('ggplot')
x_data = []
y_data = []
 
 
figure = pyplot.figure()
line, = pyplot.plot_date(x_data, y_data, '-')
 
def grafica3(frame):
    #asfasdfasfaf
    #asfasfasf
    #temperatura 
    x_data.append(datetime.now())
    y_data.append(randrange(0, 100))
    line.set_data(x_data, y_data)
    figure.gca().relim()
    figure.gca().autoscale_view()
    return line,
 
#animacion3 = FuncAnimation(figure, grafico, interval=5000)
animacion3 = FuncAnimation(figure, grafica3, interval=3000)
pyplot.show()