PyQtGraph Example

Basic PyQtGraph example.

from qtpy import QtWidgets
import numpy as np
import pyqtgraph as pg
import pyqtgraph.opengl as gl

Usually the first thing is to create a QApplication instance. Some high-level functions do this for you, but you’ll typically need to get the application instance in order to call exec_() at the end of your script anyway.

app = pg.mkQApp()

A high-level plot call:

pg.plot([1, 2, 3, 4, 5], [1, 4, 9, 16, 25])

Out:

<pyqtgraph.widgets.PlotWidget.PlotWidget(0x555f7051afc0) at 0x7f17889e87d0>

OpenGL examples won’t generally work with a headless X server unfortunately:

w = gl.GLViewWidget()
g = gl.GLGridItem()
data = np.array([[0, 0, 0], [1, 0, 0], [1, 0, 1], [0, 0, 2]])
sp = gl.GLScatterPlotItem(pos=data, color=(1, 1, 1, 1), size=10)

w.addItem(g)
w.addItem(sp)
w.show()

if __name__ == "__main__":
    app.exec_()