[Python-Dev] xturtle.py a replacement for turtle.py(!?)
glingl at aon.at
Wed Jun 28 12:57:23 CEST 2006
xturtle.py, extended turtle graphics
a new Tkinter based turtle graphics module for Python
I just have released xturtle.py (v.0.91). It can be found at:
with RequestID 1513695 (and 1513699 for the docs)
and also here
with some supplementary information.
xturtle was first announced at the edu-sig and is reported
to work properly on all major platforms (Mac, Linux and
Now I was suggested to discuss it on this list. So I'll try.
For now I'll give only two indroductory statements and wait
for a response, hoping that a fruitful discussion will evolve.
(I) The module xturtle.py is an extended reeimplementation
of turtle.py, retains its merits and is backward compatible
to turtle.py. Enhancements over turtle.py are:
# Better animation of the turtle movements, especially of
turning the turtle. So the turtles can more easily be used
as a visual feedback instrument by the (beginning) programmer.
# Different turtle shapes, gif-images as turtle shapes, user
defined and user controllable turtle shapes, among them
compound (multicolored) shapes.
# Fine control over turtle movement and screen updates via
delay(), and enhanced tracer() and speed(), update() methods.
# Aliases for the most commonly used commands, like fd for
forward etc., following the early Logo traditions. This
reduces the boring work of typing long sequences of
commands, which often occur in a natural way when kids try
to program fancy pictures on their first encounter with
turtle graphcis (still not knowing nothing about loops).
# Some simple commands/methods for creating event driven
programs (mouse-, key-, timer-events). Especially useful for
programming simple games.
# A scrollable Canvas class. The scrollable Canvas can be
extended interactively as needed while playing around with
the turtle(s) (e. g. to follow some escaped turtle). The
Window containing the default canvas when using the Pen -
class also can be resized and repositioned programmatically.
# Commands for controlling background color or background
(II) Motives: I designed this module to provide utmost easy
access to a sufficiently rich graphics toolkit. I consider
this crucial as well for students as for teachers, who e. g.
have to decide which programming language to use for
teaching programming. Considering turtle graphics as a very
appropriate tool for introductory programming courses I used
the current turtle.py as a central tool in my book "Python
for kids" despite beeing well aware of its deficiencies.
Now I propose a better one.
You may unterstand by intentions best by having a look at
the 25+ example scripts (with the included demoViewer)
provided in the xturtle.zip file, which can be downloaded
from the above mentioned website. (I think these demos
should not be included in the standard distribution, they
could go into a special edu-distro as Kirby Urner suggested
I would very much appreciate if xturtle.py could go into
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