day8 part 2 work in progress, still not working

day8/part2_cycles.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python3.11
+from typing import List
+import math
+from data import Node, parse
+
+def find_cycle(start_node, directions, node_list) -> List[Node]:
+    node_cycle = []
+    idx = 0
+    current_node = (start_node, idx)
+    while current_node not in node_cycle and not current_node[0].is_Z_node() :
+        node_cycle.append(current_node)
+        idx += 1
+        if directions[(idx - 1) % len(directions)] == 'L':
+            current_node = (current_node[0].move_left(node_list), idx % len(directions))
+        else:
+            current_node = (current_node[0].move_right(node_list), idx % len(directions))
+    node_cycle.append(current_node)
+    return [node for node,_ in node_cycle]
+
+if __name__ == '__main__':
+    directions, node_list = parse('input.txt')
+    xxA_nodes = list(filter(lambda node: node.is_A_node(), node_list))
+    cycles = list(map(len,map(lambda node: find_cycle(node, directions, node_list), xxA_nodes)))
+    print(cycles)
+    print(math.lcm(*cycles))