inNeighbors() fails on directed networks. #469
Description
Hello, below is a sample program that reproduces the error.
import networkit as nk
g = nk.graph.Graph(directed=True)
g.addNode()
g.addNode()
g.addEdge(0,1)
print(g.nodes()) # "[0, 1]"
print(g.inNeighbors(0)) # "[]"
print(g.inNeighbors(1)) # Error here!
On the final line of code, when node 1's in-neighbors are requested, I get the following error:
Traceback (most recent call last):
File "Untitled.py", line 10, in <module>
print(g.inNeighbors(1))
File "networkit/_NetworKit.pyx", line 1061, in networkit._NetworKit.Graph.inNeighbors
File "networkit/_NetworKit.pyx", line 1154, in networkit._NetworKit.Graph.forInEdgesOf
RuntimeError: An Exception occurred, aborting execution of iterator: lambda1() takes exactly one argument (4 given)
I've been playing around with this for a while and I've been unable to get it to work. Just thought I would bring it up so it can be addressed unilaterally soon.