Installing igraph tutorial from website: AttributeError: 'AxesSubplot' object has no attribute 'arc' - graph-tool

21 Sep 2022


      I have python 3.8.13, igraph 0.10.1, with matplotlib 3.6.0, and when
running the sample scripts from the install page on the website, I am
receiving an error. The scripts can be found here:
https://igraph.org/python/tutorial/latest/install.html
I am referring to the following
...
...
...
import matplotlib.pyplot as plt
import igraph as ig
fig, ax = plt.subplots()
g = ig.Graph.Famous("petersen")
ig.plot(g, target=ax)
plt.show()
I receive the following errors at the ig.plot(g, target=ax) line:
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
Cell In [120], line 6
      4 fig, ax = plt.subplots()
      5 g = ig.Graph.Famous("petersen")
----> 6 ig.plot(g, target=ax)
      8 plt.show()
File
~/anaconda3/envs/rapids-2208/lib/python3.8/site-packages/igraph/drawing/__init__.py:245,
in plot(obj, target, bbox, *args, **kwds)
    243         return
    244     else:
--> 245         plotter(
    246             backend,
    247             target,
    248             palette=palette,
    249             *args,
    250             **kwds,
    251         )
    252         return target
    254 # Cairo backend
File
~/anaconda3/envs/rapids-2208/lib/python3.8/site-packages/igraph/drawing/graph.py:558,
in __plot__(self, backend, context, *args, **kwds)
    552 from igraph.drawing import DrawerDirectory
    554 drawer = kwds.pop(
    555     "drawer_factory",
    556     DrawerDirectory.resolve(self, backend)(context),
    557 )
--> 558 drawer.draw(self, *args, **kwds)
File
~/anaconda3/envs/rapids-2208/lib/python3.8/site-packages/igraph/drawing/matplotlib/graph.py:233,
in MatplotlibGraphDrawer.draw(self, graph, *args, **kwds)
    231 drawer_method = vertex_drawer.draw
    232 for vertex, visual_vertex, coords in vertex_coord_iter:
--> 233     drawer_method(visual_vertex, vertex, coords)
    235 # Construct the iterator that we will use to draw the vertex labels
    236 vs = graph.vs
File
~/anaconda3/envs/rapids-2208/lib/python3.8/site-packages/igraph/drawing/matplotlib/vertex.py:60,
in MatplotlibVertexDrawer.draw(self, visual_vertex, vertex, coords)
     49 width = (
     50     visual_vertex.width
     51     if visual_vertex.width is not None
     52     else visual_vertex.size
     53 )
     54 height = (
     55     visual_vertex.height
     56     if visual_vertex.height is not None
     57     else visual_vertex.size
     58 )
---> 60 stroke = visual_vertex.shape.draw_path(
     61     ax,
     62     coords[0],
     63     coords[1],
     64     width,
     65     height,
     66     facecolor=visual_vertex.color,
     67     edgecolor=visual_vertex.frame_color,
     68     linewidth=visual_vertex.frame_width,
     69     zorder=visual_vertex.zorder,
     70 )
     71 ax.add_patch(stroke)
File
~/anaconda3/envs/rapids-2208/lib/python3.8/site-packages/igraph/drawing/shapes.py:168,
in CircleDrawer.draw_path(ctx, center_x, center_y, width, height, **kwargs)
    166     return mpl.patches.Circle((center_x, center_y), width / 2,
**kwargs)
    167 else:
--> 168     ctx.arc(center_x, center_y, width / 2, 0, 2 * pi)
AttributeError: 'AxesSubplot' object has no attribute 'arc'
---------------------------------------------
Not sure if its my python or package versions, or if its a configuration
issue, or possibly an issue with igraph or matplotlib. Any advice would be
most welcome