fix: orient the edge between alpha and beta as an undirected edge.

Signed-off-by: Zhiyi Huang <[email protected]>

Author: zhi-yi-huang

causallearn/search/ConstraintBased/FCI.py

@@ -499,6 +499,9 @@ def orient_on_path_helper(path, node_A, node_B):
                         changeFlag = True
                         if verbose:
                             print("Find uncovered circle path between A and B: " + graph.get_edge(node_A, node_B).__str__())
+                        edge = graph.get_edge(node_A, node_B)
+                        graph.remove_edge(edge)
+                        graph.add_edge(Edge(node_A, node_B, Endpoint.TAIL, Endpoint.TAIL))
                         orient_on_path_helper(path, node_A, node_B)
 
     return changeFlag