Vispy updating plot

gistfile1.py

import sys
import numpy as np
import vispy
from vispy import scene, app
print(vispy.__version__)
canvas = scene.SceneCanvas(keys='interactive', size=(600, 600), show=True)
canvas.measure_fps()

grid = canvas.central_widget.add_grid(margin=10)
grid.spacing = 0
title = scene.Label("Plot Title", color='white')
title.height_max = 40
grid.add_widget(title, row=0, col=0, col_span=2)

yaxis = scene.AxisWidget(orientation='left',
                         axis_label='Y Axis',
                         axis_font_size=20,
                         axis_label_margin=50,
                         tick_label_margin=5)
yaxis.width_max = 80
grid.add_widget(yaxis, row=1, col=0)

xaxis = scene.AxisWidget(orientation='bottom',
                         axis_label='X Axis',
                         axis_font_size=20,
                         axis_label_margin=50,
                         tick_label_margin=5)

xaxis.height_max = 80
grid.add_widget(xaxis, row=2, col=1)
right_padding = grid.add_widget(row=1, col=2, row_span=1)
right_padding.width_max = 50

view = grid.add_view(row=1, col=1, border_color='white')

data = np.zeros((1000, 2))
plot = scene.Line(data, parent=view.scene)

view.camera = 'panzoom'
plot.set_data(data, width=4, color='g')

xaxis.link_view(view)
yaxis.link_view(view)
import time
t0 = time.time()

def update(up):
    global data
    data[:, 0] = np.linspace(0, 10, 1000)+time.time()-t0
    data[:, 1] = np.sin(data[:, 0])+0.4*np.random.normal(size=(1000))
    plot.set_data(data)
    view.camera.set_range(y=(data[:, 1].max(), data[:, 1].min()), x=(data[:, 0].max(), data[:, 0].min()))


t = app.Timer()
t.connect(update)
t.start()

if __name__ == '__main__' and sys.flags.interactive == 0:
    app.run()