help:problem using the RawPen class/turtle module.

[alex]

missive at frontiernet.net (Lee Harr) wrote in message news:<slrnaauvbv.3v.missive at whave.frontiernet.net>...
> On 6 Apr 2002 03:03:14 -0800, alex <ale_xp at yahoo.com> wrote:
> > Hi all, I'm a Python beginner, and I'm trying to use
> > the module "turtle" to do some turtle graphics.
> > But I have a problem when I try to use the turtle
> > class RawPen in order to use it with a Canvas. 
> > In particular when I try to run the following code: ...
> > 
> > ...
> > root = Tkinter.Tk()
> > c       =   Tkinter.Canvas(root,heigh=200,width=300)
>                                   ^^^^^
>             just a transcription typo, right?

yes a bad copy&paste it was 'height' sorry.

> 
> > c.pack()
> > mypen   =   turtle.RawPen(c)
> > ... 
> > 
> 
> I tried this at the interactive python prompt:
> 
> import turtle
> import Tk
> root=Tkinter.Tk()
> c=Tkinter.Canvas(root)
> c.pack(expand=1)
> mypen=turtle.RawPen(c)
> 
> 
> and got no errors.
> 
> This was with python2.1 configured with Tkinter
> 
> So it may be a configuration (rather than a
> usage or syntax) problem.

Hi, 
thank you for your reply,

I tryied to type your code on my python command line
and unfortunatly I have the same message.
So well yes I think you are right, something's wrong
in my configuration.

It seems that it comes from the turtle.py module, I'll
try to have a look at it(even if I'm not an expert of
python modules), 
it seems strange to me that it doesn't work because 
it is in the standard distribution and of course I 
haven't changed it.

I made a copy & paste of my little test.


Python 2.2 (#1, Mar  9 2002, 18:21:48) 
[GCC 2.95.2 19991024 (release)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import turtle
>>> import Tkinter
>>> root=Tkinter.Tk()
>>> c=Tkinter.Canvas(root)
>>> c.pack(expand=1)
>>> mypen=turtle.RawPen(c)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/local/lib/python2.2/lib-tk/turtle.py", line 16, in __init__
    self.reset()
  File "/usr/local/lib/python2.2/lib-tk/turtle.py", line 42, in reset
    self.clear()
  File "/usr/local/lib/python2.2/lib-tk/turtle.py", line 53, in clear
    self._draw_turtle()
  File "/usr/local/lib/python2.2/lib-tk/turtle.py", line 262, in _draw_turtle
    self._arrow = _canvas.create_line(x-dx,y+dy,x,y,
AttributeError: 'NoneType' object has no attribute 'create_line'


alex.