Update FCI.py - using node_map to only get node_map func once

Signed-off-by: Sven Pieper <[email protected]>

Author: svenpieper

causallearn/search/ConstraintBased/FCI.py

@@ -322,7 +322,7 @@ def isNoncollider(graph: Graph, sep_sets: Dict[Tuple[int, int], Set[int]], node_
                   node_k: Node) -> bool:
     node_map = graph.get_node_map()
     sep_set = sep_sets.get((node_map[node_i], node_map[node_k]))
-    return sep_set is not None and sep_set.__contains__(graph.get_node_map()[node_j])
+    return sep_set is not None and sep_set.__contains__(node_map[node_j])
 
 
 def ruleR3(graph: Graph, sep_sets: Dict[Tuple[int, int], Set[int]], bk: BackgroundKnowledge | None, changeFlag: bool,