Reeborg's World Around 1 - Variable (Python's While Loop)

I'm new to programming and I'm trying my hand at Reeborg's World problems. However, I've reached a block at Around 1 - Variable.

This is my code right now:

def walk(): if wall_on_right()==True and wall_in_front()==False: move() if wall_in_front()==True: turn_left() move() put("token") move() while object_here("token")!=True: walk() if object_here("token")==True: done() 

The problem is that it creates an infinite loop. It seems that the while function is not recognizing the token put at the starting position as a the condition that breaks out of the loop.

Thank you for your help.

3 Answers

def turn_right(): turn_left() turn_left() turn_left() def jump(): move() turn_left() move() turn_right() move() turn_right() move() turn_left() def turn_up(): turn_left() move() turn_right() move() turn_right() move() turn_left() #for steps in range (0, 5): #jump() #hurdle = 6 while at_goal() != True: if wall_in_front() == True: turn_up() elif front_is_clear() == True: move() This is how I solved mine for puzzle 3 

This is how I finished the same exercise:

put() while not wall_in_front(): move() if wall_in_front(): turn_left() elif object_here(): done() 

Basically:

• It moves straight while there is not wall in the front and it keeps checks with a while loop if there is wall or not in front.
• If there is a wall it turns left and gets in while loop again.
• To stop the while loop; to determine the starting point first I left a token with put() function. With an elif statement after if statement I have used object_here() function so it can detect the object and stop the while loop with done() function.

If anyone has an better solution for that I'd love to see different approaches.

I fiddled a little more on this problem and found a way to solve it

def walk(): while wall_on_right() and not wall_in_front(): if object_here(): take() done() else: move() def turn(): while wall_on_right() and wall_in_front(): turn_left() move() put("token") move() while True: walk() turn() 

The problem mostly consists of how I was understanding the object_here () function since, as mentioned in their page "Reeborg can determine whether or not there is at least one object at his location". Therefore, adding a take () and done () function in case Reeborg detected an object in a given field was able to do the trick.