You are reading an old version of the documentation (v3.0.0). For the latest version see https://matplotlib.org/stable/api/_as_gen/matplotlib.axes.Axes.xaxis_inverted.html
Version 3.0.0
matplotlib
Fork me on GitHub

matplotlib.axes.Axes.xaxis_inverted

Axes.xaxis_inverted()

Return whether the x-axis is inverted.