You are reading an old version of the documentation (v2.2.3). For the latest version see https://matplotlib.org/stable/api/_as_gen/matplotlib.axes.Axes.set_xbound.html
Version 2.2.3
matplotlib
Fork me on GitHub

matplotlib.axes.Axes.set_xbound

Axes.set_xbound(lower=None, upper=None)

Set the lower and upper numerical bounds of the x-axis.

This method will honor axes inversion regardless of parameter order. It will not change the _autoscaleXon attribute.