[Tutor] Questions about the new turtle module in Python 2.6b2

[Gregor Lingl]

Dick Moores schrieb:
> At 03:12 AM 8/9/2008, Dick Moores wrote:
>> 4. For my random_rectangles.py program I've started to try out the 
>> new turtle. (See the current state of random_rectanglesV16_web.py at 
>> < http://py77.python.pastebin.com/d3e842821>.) 
>> <http://py77.python.pastebin.com/d3e842821%3E.%29%A0> The only 
>> downside I've found is that the new turtle is much faster that the 
>> old. I want to set the speed so that the outlines of rectangles are 
>> drawn slowly enough that the user (me at present) can both appreciate 
>> the colors and have time to check the names of the colors being 
>> printed in the console window. Using the old turtle, I found that a 
>> default delay of 1 ((delay(1)) was just right; with the new turtle, 
>> setting a delay of even 50 affects only the first cycle of 
>> rectangles. So I don't use delay at all. Setting the slowest speed of 
>> 1 (speed(1)) is still too fast. How can I slow down the drawing of 
>> the rectangles?
>
> I seem to have solved #4.
>
> I had been using tracer() as tracer(True) in my function draw_rect(). 
> In rereading the doc, I noticed that < 
> http://docs.python.org/dev/library/turtle.html#turtle.tracer>
> has
> "turtle.tracer(/flag=None/, /delay=None/)"
>
> so in draw_rect() I tried changing tracer(True) to tracer(True, dly). 
> (See the new version, random_rectanglesV17_web.py, at < 
> http://py77.python.pastebin.com/f54c9211f>, lines 220, 230, 240, etc.)
>
> Then I enabled the user to enter both speed and delay, with a default 
> speed of 1 and a default delay of 15 (see the new function 
> get_speed_and_delay_from_user(), lines 153-179). On my computer, these 
> defaults seemed to be ideal.
>
That's fine!
> But now I have another puzzle: As long as delay is kept constant, it 
> doesn't seem to matter what speed is chosen -- from the slowest of 1 
> to the fastest of 0. Why is speed irrelevant?
Did you observe that faster speeds need arguments in the range from 2 to 10?
That means speed(10) is fastest speed.

Gregor
>
> Dick
>
> BTW at < http://py77.python.pastebin.com/f54c9211f>, if you click on 
> the 'view diff' link just above the code, you'll get a diff with the 
> immediately previous version.
>
>
>
>
>
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