The Vertex methods in_neighbours() and all_neighbours() throw an error for undirected graphs. Is this behavior intended? Code:
> import numpy as np > import numpy.random as rand > import graph_tool.all as gt > > n = 1000; p = 2.0*np.log(n)/n > g = gt.random_graph(n, lambda: rand.poisson((n - 1) * p), directed=False, > model="erdos") > v = [v for v in g.vertices() if g.vertex_index[v] == 0][0] > [u.__int__() for u in v.out_neighbours()] > > # Fail: > [u.__int__() for u in v.in_neighbours()] > # Fail: > [u.__int__() for u in v.all_neighbours()] > > # Correct by setting direction > g.is_directed() > g.set_directed(True) > g.is_directed() > [u.__int__() for u in v.in_neighbours()] > [u.__int__() for u in v.out_neighbours()] Error: > File "gt_test.py", line 11, in <module> > [u.__int__() for u in v.in_neighbours()] > File > "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/graph_tool/__init__.py", > line 2327, in _in_neighbours > yield e.source() > ValueError: invalid edge descriptor
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