mpl_toolkits.mplot3d.axes3d.Axes3D.get_zgridlines

Axes3D.get_zgridlines()

Return the zaxis' grid lines as a list of Line2D.

Warning

Ticks and their constituent parts, including grid lines, are not persistent. Various operations can create, delete, and modify the tick instances; see Tick objects.

You should generally use Axis.set_tick_params / Axis.get_tick_params to define and query grid styling; see Styling ticks (tick parameters).