[issue29560] Turtle graphics fill behavior differs between versions

[Carol Willing]

Carol Willing  added the comment:

The next action for this issue would be to run the demo listed on Python 3.7 
and report the results back here. We can then document expected behavior if it 
differs.

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nosy: +willingc

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[issue29560] Turtle graphics fill behavior differs between versions

[Terry J. Reedy]

Terry J. Reedy added the comment:

I believe that there is a known difference between tk on Windows and linux with 
respect to filling of even and odd areas.  If I understand correctly, you saw 
one behavior on Windows and the other on Linux.  If so, this is not a bug in 
tkinter.

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nosy: +serhiy.storchaka, terry.reedy

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[issue29560] Turtle graphics fill behavior differs between versions

[John Simmons]

New submission from John Simmons:

When I run the demo program on the library 24.1 documentation page to draw the 
star, it colors the entire star yellow, not just the parts that are show yellow 
on the page.  This appears to be a behavior change.  This is running on a 
Windows 7 or 10 machine with Python 3.2, 3.5, or 3.6.

I have not tried this program at home, but when I run a similar program that 
draws and then fills 10 overlapping circles, my Linux Mint 17.3 computer at 
home, running IDLE in Python 3.4, fills the "interior" points inside and odd 
number of circles but does not fill the "exterior" points inside an even number 
of circles.  This appears to be the behavior shown on documentation page 24.1.  
I would like to know what is intended to be the correct behavior and why the 
implementations differ.

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components: Tkinter
messages: 287794
nosy: John Simmons
priority: normal
severity: normal
status: open
title: Turtle graphics fill behavior differs between versions
type: behavior
versions: Python 3.5, Python 3.6

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