def delta_plus(self, nodes):
        bool_indices_head = np.array([x[0] in nodes for x in self.edges])
        bool_indices_tail = np.array([x[1] not in nodes for x in self.edges])
        bool_indices_edges = np.bitwise_and(
            bool_indices_head, bool_indices_tail)
        return self.edges[bool_indices_edges]
test function with 1 argument
dataset/ETHPy150Open dnlcrl/PyGraphArt/src/graph.py/Graph.delta_plus--crossover with--dataset/ETHPy150Open xraypy/xraylarch/tests/test_plugins_call.py/TestPlugins.test1