The same would apply to many other properties: y heading position speed pensize color shape shear tilt visible maybe sth else.. On Mon, Apr 27, 2015 at 6:19 PM, Jurgis Pralgauskis < jurgis.pralgauskis@gmail.com> wrote:

Hi,

turtle module is nice way to introduce to Python, but, if I want to increase x by 10, I have to write

t.setx( t.xcor() + 1)

which is uglier (and not beginner friendly) than common: t.x = t.x + 1

beginners tend to forget () after xcor and so on...

This could be achieved with several property <https://docs.python.org/3/library/functions.html#property>/decorator lines Would it be possible for Py 3.5? :)

ps.: I teach programming games, and more robust expressions (for collision checking) would look cleaner: if ball.x-5 > box.x-10 and ball.x+5 < box.x+10: ball.x =100

instead of if ball.xcor()-5 > box.xcor()-10 and ball.xcor()+5 < box.xcor()+10: ball.setx( 100 )

pps.: I don't know how would default turtle instance behave could I then write x = x + 1 instead of setx( xcor() + 1) ?

-- Jurgis Pralgauskis tel: 8-616 77613; Don't worry, be happy and make things better ;) http://galvosukykla.lt

-- Jurgis Pralgauskis tel: 8-616 77613; Don't worry, be happy and make things better ;) http://galvosukykla.lt

On Mon, Apr 27, 2015 at 12:19 PM, Jurgis Pralgauskis < jurgis.pralgauskis@gmail.com> wrote:

Hi,

turtle module is nice way to introduce to Python, but, if I want to increase x by 10, I have to write

t.setx( t.xcor() + 1)

which is uglier (and not beginner friendly) than common: t.x = t.x + 1

beginners tend to forget () after xcor and so on...

This could be achieved with several property <https://docs.python.org/3/library/functions.html#property>/decorator lines Would it be possible for Py 3.5? :)

I doubt very much that anything is going to happen with the official Turtle module unless the person that actually wrote it decides it's worth looking into. Following a suggestion you made on this list, I submitted a patch ( http://bugs.python.org/issue23660) about 6 weeks ago and no one has looked into it as far as I can tell. You could possibly write your own Turtle module, as a wrapper to the official one, using properties the way you mention.

ps.: I teach programming games, and more robust expressions (for collision checking) would look cleaner: if ball.x-5 > box.x-10 and ball.x+5 < box.x+10: ball.x =100

instead of if ball.xcor()-5 > box.xcor()-10 and ball.xcor()+5 < box.xcor()+10: ball.setx( 100 )

Yes, I prefer the first style too.

pps.: I don't know how would default turtle instance behave could I then write x = x + 1 instead of setx( xcor() + 1) ?

This would not be possible: x would just be a variable, with no relation to a given turtle. At the very least, one would need to call some update() function which could look at the values of the variables in locals() and proceed from there.... But I think that this would be counter-intuitive and not a good way to teach about Python. André

-- Jurgis Pralgauskis tel: 8-616 77613; Don't worry, be happy and make things better ;) http://galvosukykla.lt

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