Am 06.10.18 um 06:55 schrieb Snehal Shekatkar:
> Dear Tiago,
>
> I am trying to use a matplotlib colormap for coloring vertices, and I need
> transparency also.
>
> import graph_tool.all as gt
> import matplotlib.pyplot as plt
> import matplotlib.cm as cm
> plt.switch_backend("cairo")
>
> g = gt.collection.data["karate"]
> position = gt.sfdp_layout(g)
>
> fig, ax = plt.subplots(1, 1)
> gt.graph_draw(g, pos = position, vertex_fill_color = gt.local_clustering(g),
> vcmap = (cm.inferno, 0.3), mplfig = ax)
> plt.savefig("test.pdf")
>
> I am getting the following error:
>
> Traceback (most recent call last):
> File "test.py", line 12, in <module>
> plt.savefig("test.pdf")
> File "/usr/lib/python3/dist-packages/matplotlib/pyplot.py", line 701, in
> savefig
> res = fig.savefig(*args, **kwargs)
> File "/usr/lib/python3/dist-packages/matplotlib/figure.py", line 1834, in
> savefig
> self.canvas.print_figure(fname, **kwargs)
> File "/usr/lib/python3/dist-packages/matplotlib/backend_bases.py", line
> 2267, in print_figure
> **kwargs)
> File
> "/usr/lib/python3/dist-packages/matplotlib/backends/backend_cairo.py", line
> 470, in print_pdf
> return self._save(fobj, 'pdf', *args, **kwargs)
> File
> "/usr/lib/python3/dist-packages/matplotlib/backends/backend_cairo.py", line
> 534, in _save
> self.figure.draw(renderer)
> File "/usr/lib/python3/dist-packages/matplotlib/artist.py", line 55, in
> draw_wrapper
> return draw(artist, renderer, *args, **kwargs)
> File "/usr/lib/python3/dist-packages/matplotlib/figure.py", line 1299, in
> draw
> renderer, self, artists, self.suppressComposite)
> File "/usr/lib/python3/dist-packages/matplotlib/image.py", line 138, in
> _draw_list_compositing_images
> a.draw(renderer)
> File "/usr/lib/python3/dist-packages/matplotlib/artist.py", line 55, in
> draw_wrapper
> return draw(artist, renderer, *args, **kwargs)
> File "/usr/lib/python3/dist-packages/matplotlib/axes/_base.py", line 2437,
> in draw
> mimage._draw_list_compositing_images(renderer, self, artists)
> File "/usr/lib/python3/dist-packages/matplotlib/image.py", line 138, in
> _draw_list_compositing_images
> a.draw(renderer)
> File "/usr/lib/python3/dist-packages/graph_tool/draw/cairo_draw.py", line
> 1565, in draw
> self.vorder, self.eorder, self.nodesfirst, self.kwargs)
> File "/usr/lib/python3/dist-packages/graph_tool/draw/cairo_draw.py", line
> 690, in cairo_draw
> vattrs, vdefaults = _attrs(vprops, "v", g, vcmap)
> File "/usr/lib/python3/dist-packages/graph_tool/draw/cairo_draw.py", line
> 484, in _attrs
> nattrs[int(attr)] = _prop(d, g, _convert(attr, v, cmap))
> File "/usr/lib/python3/dist-packages/graph_tool/draw/cairo_draw.py", line
> 323, in _convert
> cmap, alpha = cmap
> ValueError: too many values to unpack (expected 2)
>
> However, if I remove vcmap argument, it draws fine. I am on Ubuntu 18.04,
> and the graph-tool version is 2.27. Kindly help me.This seems like a bug. Please open an issue in the website, and I'll fix it when time permits. Best, Tiago -- Tiago de Paula Peixoto <ti...@skewed.de>
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