René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"PS backend fails to save polar plot","articleBody":"This code:\n\n```\nfrom matplotlib.pyplot import figure\n\nfig = figure()\nfig.add_subplot(212, polar=True)\n\nfig.savefig('fail.eps')\n```\n\nfails with this error:\n\n```\nTraceback (most recent call last):\n  File \"C:\\Users\\Ruben\\Desktop\\test.py\", line 13, in \u003cmodule\u003e\n    fig.savefig('fail.eps')\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\figure.py\", line 1422, in savefig\n    self.canvas.print_figure(*args, **kwargs)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\backends\\backend_qt4agg.py\", line 167, in print_figure\n    FigureCanvasAgg.print_figure(self, *args, **kwargs)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\backend_bases.py\", line 2220, in print_figure\n    **kwargs)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\backend_bases.py\", line 1947, in print_eps\n    return ps.print_eps(*args, **kwargs)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\backends\\backend_ps.py\", line 981, in print_eps\n    return self._print_ps(outfile, 'eps', *args, **kwargs)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\backends\\backend_ps.py\", line 1009, in _print_ps\n    **kwargs)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\backends\\backend_ps.py\", line 1102, in _print_figure\n    self.figure.draw(renderer)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\artist.py\", line 56, in draw_wrapper\n    draw(artist, renderer, *args, **kwargs)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\figure.py\", line 1035, in draw\n    func(*args)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\artist.py\", line 56, in draw_wrapper\n    draw(artist, renderer, *args, **kwargs)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\axes.py\", line 2088, in draw\n    a.draw(renderer)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\artist.py\", line 56, in draw_wrapper\n    draw(artist, renderer, *args, **kwargs)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\axis.py\", line 1101, in draw\n    tick.draw(renderer)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\artist.py\", line 56, in draw_wrapper\n    draw(artist, renderer, *args, **kwargs)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\axis.py\", line 235, in draw\n    self.gridline.draw(renderer)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\artist.py\", line 56, in draw_wrapper\n    draw(artist, renderer, *args, **kwargs)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\lines.py\", line 563, in draw\n    drawFunc(renderer, gc, tpath, affine.frozen())\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\lines.py\", line 939, in _draw_lines\n    self._lineFunc(renderer, gc, path, trans)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\lines.py\", line 994, in _draw_dotted\n    renderer.draw_path(gc, path, trans)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\backends\\backend_ps.py\", line 575, in draw_path\n    self._draw_ps(ps, gc, rgbFace)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\backends\\backend_ps.py\", line 907, in _draw_ps\n    id = self._get_clip_path(clippath, clippath_trans)\n  File \"C:\\WinPython-64bit-3.3.3.2\\python-3.3.3.amd64\\lib\\site-packages\\matplotlib\\backends\\backend_ps.py\", line 556, in _get_clip_path\n    id = self._clip_paths.get((clippath, clippath_transform))\nTypeError: unhashable type: 'Affine2D'\n```\n\nThis cannot be intentional.\n","author":{"url":"https://github.com/rubenvb","@type":"Person","name":"rubenvb"},"datePublished":"2014-02-21T14:22:04.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":13},"url":"https://github.com/2828/matplotlib/issues/2828"}