You are reading an old version of the documentation (v2.0.0). For the latest version see https://matplotlib.org/stable/api/_as_gen/matplotlib.axis.Axis.set_pickradius.html
matplotlib

Travis-CI:

This Page

matplotlib.axis.Axis.set_pickradius

Axis.set_pickradius(pickradius)

Set the depth of the axis used by the picker

ACCEPTS: a distance in points