Problem

axisartist by default draws ticks on the opposite side of the labels. It provides a method Ticks.set_tick_out() to change it to draw ticks on the same side of the label. However, there is no way to draw ticks across both sides.

Proposed Solution

Please add a function to axisartist.Ticks that enables one to draw ticks on both sides of the axis.

Additional context and prior art

Drawing tick marks spanning an axis is a common artistic choice and should be possible in axisartist.