Live update plotting of a random timeseries using matplotlib

live_timeseries.py

# Ours, no blit, plot a timeseries
from datetime import datetime
from matplotlib import pyplot
from matplotlib.animation import FuncAnimation
from random import randrange
import numpy as np

n_pts = 256
x_data = np.linspace(0, n_pts-1, n_pts)
y_data = np.zeros(n_pts)

figure = pyplot.figure()
line, = pyplot.plot(x_data, y_data, '-')

def update(frame):
    # TODO: collect new data here 
    y_data = np.random.rand(256)
    line.set_data(x_data, y_data)
    figure.gca().relim()
    figure.gca().autoscale_view()
    return line,

animation = FuncAnimation(figure, update, interval=200)

pyplot.show()