You are reading an old version of the documentation (v2.2.2). For the latest version see https://matplotlib.org/stable/api/_as_gen/matplotlib.axes.Axes.get_data_ratio.html
Version 2.2.2
matplotlib
Fork me on GitHub

matplotlib.axes.Axes.get_data_ratio

Axes.get_data_ratio()

Returns the aspect ratio of the raw data.

This method is intended to be overridden by new projection types.