8x8 Network Utility __top__ -

> down 4,0 Node (4,0) is now down

> send 0,0 7,7 Routing failed: Node (4,0) is down — path blocked 8x8 network utility

class MeshNetwork: def (self, size=8): self.size = size self.nodes = {} for x in range(size): for y in range(size): self.nodes[(x, y)] = "up" # all nodes initially up > down 4,0 Node (4,0) is now down

return path, "Success"

while True: cmd = input("\n> ").strip().lower() if cmd == "quit": break elif cmd == "show": net.display_grid() elif cmd.startswith("down ") or cmd.startswith("up "): parts = cmd.split() if len(parts) == 2: try: x, y = map(int, parts[1].split(",")) state = "up" if parts[0] == "up" else "down" if net.set_node_state((x, y), state): print(f"Node (x,y) is now state") else: print("Invalid node or state") except: print("Use: down x,y or up x,y") elif cmd.startswith("send"): parts = cmd.split() if len(parts) == 3: try: src = tuple(map(int, parts[1].split(","))) dst = tuple(map(int, parts[2].split(","))) path, status = net.route_packet(src, dst) if path is None: print(f"Routing failed: status") else: print(f"Path: src -> ' -> '.join(map(str, path))") print(f"Status: status") except: print("Use: send x1,y1 x2,y2") else: print("Unknown command. Try: send, down, up, show, quit") if == " main ": main() Example usage === 8x8 Mesh Network Utility === Commands: send <x1,y1> <x2,y2> | down/up <x,y> | show | quit > show 8x8 Network Grid (U=up, .=down): 0 1 2 3 4 5 6 7 0 U U U U U U U U 1 U U U U U U U U 2 U U U U U U U U 3 U U U U U U U U 4 U U U U U U U U 5 U U U U U U U U 6 U U U U U U U U 7 U U U U U U U U 0 Node (4

# move in Y direction step_y = 1 if ty > y else -1 while y != ty: y += step_y if self.nodes[(x, y)] != "up": return None, f"Node (x,y) is down — path blocked" path.append((x, y))