import random 
import time

NUM_PARKING_SPOTS = 10

# Initialize parking lot with False (vacant)
parking_lot = [False] * NUM_PARKING_SPOTS

def read_sensor(spot):
    """Simulate reading the status of the parking spot."""
    return parking_lot[spot]

def update_parking_lot():
    """Simulate the real-time update of parking lot status."""
    global parking_lot
    for i in range(NUM_PARKING_SPOTS):
        parking_lot[i] = random.choice([True, False])

def display_parking_lot():
    """Display the current parking lot status."""
    print("Parking Lot Status:")
    for i in range(NUM_PARKING_SPOTS):
        status = "Occupied" if parking_lot[i] else "Vacant"
        print(f"Spot {i + 1}: {status}")
    print()

def find_vacant_spots():
    """Find all vacant spots in the parking lot."""
    vacant_spots = []
    for i in range(NUM_PARKING_SPOTS):
        if not parking_lot[i]:
            vacant_spots.append(i + 1)
    return vacant_spots

def main():
    """Main function to simulate the smart parking system."""
    print("Welcome to Smart Parking Service!")

    while True:
        update_parking_lot()
        display_parking_lot()

        vacant_spots = find_vacant_spots()

        if vacant_spots:
            spots_str = ', '.join(str(spot) for spot in vacant_spots)
            print(f"Vacant spots: {spots_str}. You can park here!")
        else:
            print("Sorry, no vacant spots available.")

        time.sleep(5)

if __name__ == "__main__":
    main()