Python pyqtgraph how to set x and y axis limits on graph, no autorange

Question

I would like to know how I can set the x and y axis limits that are displayed for a pyqtgraph.GraphicsWindow.addPlot object. I need to display a lot of data inside a loop (hence using pyqtgraph) but I would rather preallocate my axes as opposed to allowing autorange to potentially enhance speed. As an example,

from pyqtgraph.Qt import QtGui, QtCore
import numpy as np
import pyqtgraph as pg
app = QtGui.QApplication([])
win = pg.GraphicsWindow(title="My plotting examples")
win.resize(1000,600)
win.setWindowTitle('pyqtgraph example: Plotting')
p1 = win.addPlot(title="plot1")
p2 = win.addPlot(title="plot2")
curve1 = p1.plot(pen='y')
curve2 = p1.plot(pen='r')
curve3 = p2.plot(pen='b')
x = np.linspace(0,10,1000)
x_current = x[0]
p1.setXRange((5,20), padding=0)
for i in range(1,len(x)):
    x_current = np.append(x_current,x[i])
    curve1.setData(x_current,np.sin(x_current))
    curve2.setData(x_current,np.cos(x_current))
    curve3.setData(x_current,np.tan(x_current))
    app.processEvents()

if __name__ == '__main__':
    import sys
    if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
        QtGui.QApplication.instance().exec_()

The problem lies in the line p1.setXRange((5,20),padding=0). This results in the error: TypeError: setXRange() takes at least 3 arguments (3 given)

I think this should be a very simple question, just setting the axis ranges before plotting.

Answer 1

As the error message indicates, you have not supplied the correct number of arguments to setXRange(). The correct line should look like:

p1.setXRange(5, 20, padding=0)

Documentation here: http://www.pyqtgraph.org/documentation/graphicsItems/viewbox.html#pyqtgraph.ViewBox.setXRange