[Tutor] function error

[roberto]

On Thu, Sep 30, 2010 at 1:45 PM, ALAN GAULD <alan.gauld at btinternet.com> wrote:
> Copy the code into a text file with a name ending in .py - lets call it
> myfile.py for now
> (if you have not already done so)
>
> From a bash prompt type
>
> $ python myfile.py
>
> Then cut n paste any error messages into an email to the list

well, actually i corrected the code so that the function outOfBounds()
is directly called (as you can see hereafter);
but if you have time to run the code you'll see the same strange
behavior as me (maybe):
when the arrow hits anyone of the window borders, it gets stuck back
and forth indefinitely and never starts the path again

thank you in advance
##############################################################################
import turtle, random

def checkForward(distance):
	old_position = turtle.position()
	turtle._pen.up()
	# no show/hide turtle methods in my turtle module !
	turtle.forward(distance)
	forward_failed = outOfBounds()
	turtle.setx(old_position[0]); turtle.sety(old_position[1])
	turtle._pen.down()
	# no show/hide turtle methods in my turtle module !
	if outOfBounds() == 'false':
		turtle.forward(distance)
		
def stuck():
	return forward_failed

def outOfBounds():
	if (abs(turtle.position()[0]) > turtle.window_height()/2) or
(abs(turtle.position()[1]) > turtle.window_width()/2):
		return "true"
	else:
		return "false"
	
def randomMove2(d1, d2, a1, a2):
	 while 1:
		 turtle.left(random.uniform(a1,a2))
		 checkForward(random.uniform(d1,d2))
		 if outOfBounds() == 'true':
			 turtle.right(180)
#############################################################################

-- 
roberto