René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"'Poly3DCollection' object has no attribute '_facecolors2d'","articleBody":"The following minimal example demonstrates the issue:\n\n```\nimport numpy as np\nimport matplotlib.tri as mtri\nimport matplotlib.pyplot as plt\nfrom mpl_toolkits.mplot3d import Axes3D\n\ny,x = np.ogrid[1:10:100j, 1:10:100j]\nz2 = np.cos(x)**3 - np.sin(y)**2\nfig = plt.figure()\nax = fig.add_subplot(111, projection='3d')\nr = ax.plot_surface(x,y,z2, cmap='hot')\nr.get_facecolors()\n```\n\nIt fails on the last line with the following traceback:\n\n```\nAttributeError                            Traceback (most recent call last)\n\u003cipython-input-13-de0f41d662cd\u003e in \u003cmodule\u003e()\n----\u003e 1 r.get_facecolors()\n\n/home/oliver/.virtualenvs/mpl/local/lib/python2.7/site-packages/mpl_toolkits/mplot3d/art3d.pyc in get_facecolors(self)\n    634\n    635     def get_facecolors(self):\n--\u003e 636         return self._facecolors2d\n    637     get_facecolor = get_facecolors\n    638\n\nAttributeError: 'Poly3DCollection' object has no attribute '_facecolors2d'\n```\n\nTested with mpl versions 1.3.1 and 1.4.2.\n\nSent here by Benjamin, from the mpl users mailing list (mail with the same title). Sorry for dumping this without more assistance, I'm not yet at a python level where I can help in debugging, I think (well, it seems daunting).\n","author":{"url":"https://github.com/oliverw1","@type":"Person","name":"oliverw1"},"datePublished":"2015-02-05T22:10:25.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":15},"url":"https://github.com/4067/matplotlib/issues/4067"}