def getAllDirEdges(self):
        (rows, cols) = numpy.nonzero(self.W)
        edges = numpy.c_[rows, cols]

        return edges
Returns the set of directed edges of the current graph as a matrix in which each
dataset/ETHPy150Open charanpald/APGL/apgl/graph/SparseGraph.py/SparseGraph.getAllDirEdges