I’m trying to code the robot to randomly choose to go left or right in the Wall Maze + Playground, using this code in an if/elif/else statement.
random_direction = random.choice([LEFT,RIGHT)])
drivetrain.turn(random_direction)
I keep getting an error message though that it doesn’t like choice. I looked through the code elements and did not find a random block. I assume the error is because there is no defined choice function. Is there a way to code the random function in VexVR?
Thanks!
Michelle
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Sorry, I realized I had an extra parathesis…
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Sounds good! If you need more help please let us know! 
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Actually, I corrected that error and it runs but the code is not randomly choosing Left or Right.
I altered the Wall Maze + playground and added B to be a t-junction. In the code, if both the left and right distance sense > 300 MM, I coded random_direction to randomly choose LEFT RIGHT and then feed that into drivetrain.turn(random_direction) . After it does, I jsut have it going forward 300mm to see if it works. Each time I get a crash, which I assume is because it’s not turning before going the 300mm. I have attached both the altered playground and the python file. How can I get the robot to turn randomly left or right? Incidentally, I am starting at A, (I assumed you knew that but wanted to be 100% clear).
Thanks!
Michelle
MSherry-MazeSolver-REVISED1.vrpython (2.2 KB)
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Check that Lauren, I figured it out with the code below. I needed to use a turn_for command and input the value from random_direction.
if left_distance.get_distance(MM) and right_distance.get_distance(MM) > 300:
random_direction = random.choice([LEFT,RIGHT])
drivetrain.turn_for(random_direction,90,DEGREES)
wait(1,SEC)
drivetrain.stop()
drivetrain.drive_for(FORWARD,300,MM)
Sorry to trouble you!
Michelle
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Hi @Michelle_Sherry! No problem at all! I appreciate all of your questions I’m glad it worked out!
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Do either of yall know how to do this with blocks? Want to show my beginner students but I can’t figure it out myself.
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You could use the following block code to mimic the random turning left or right. And basically the pick random will choose between 1 and 2, if it is 1, it will turn right, otherwise, turn left.
I also removed some wait commands for simplicity purpose.
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