[Python] PyQtGraph opening then closing straight away

I'm running some basic code from the documentation

import pyqtgraph as pg
import numpy as np
x = np.arange(1000)
y = np.random.normal(size=(3, 1000))
plotWidget = pg.plot(title="Three plot curves")
for i in range(3):
plotWidget.plot(x, y, pen=(i,3))


But for some reason the window open then closes straight away, i just see a flicker of it. Is there some sort of function in which i can keep the window open?

Continue reading...