[Matplotlib-users] where to download module mpl_toolkits.mplot3d.art3d

[WALTER A. <ala...@th...>]

Hello
I 've made some test so as to display a rectangle in a 3d view by using matplotlib methods.
I get examples from address http://nullege.com/codes/show/src%40m%40a%40matplotlib-HEAD%40matplotlib%40lib%40mpl_toolkits%40mplot3d%40axes3d.py/881/art3d.Line3DCollection/python

import warnings
from matplotlib.axes import Axes, rcParams
from matplotlib import cbook
from matplotlib.transforms import Bbox
from matplotlib import collections
import numpy as np
from matplotlib.colors import Normalize, colorConverter, LightSource
  
import art3d
import proj3d
import axis3d


then I remark that art3d is not included in matplotlib module, but I do not find any way to download art3d from the net. And why "import art3d" rather than "import mpl_toolkits.mplot3d.art3d" ?
Is anybody is aware about this topic.
Thanks a lot.