Is this not correct? I can't see the output.

Question

from turtle import*
clr=["violet","indigo","blue","green","yellow","orange","red","black"]
pensize(5)
for n in clr:
color("black",n)
begin_fill()
circle(60)
circle(70)
circle(80)
circle(90)
end_fill()
rt(45)

Answer 1

If you are trying to run this code in the playground, graphics are not supported. The way the playground works prevents it. Your code is run on a remote server. Once it is done, the output is sent back. Graphic output doesn't translate well into data packets of bytes so it doesn't get done.

Answer 2

I actually gave them a design that could handle it. The app already handles web pages. They have a server process to hand feed the input to the user code and capture the output before sending it back. Minor change to that process could give us interactive I/O. Graphics still wouldn't work, but happy users would still result.

Answer 3

...though it would be nice if the _app_ had a console so code could run interactively.

*Yes, I'll keep mentioning that because SL never got back to my mail. Actually, I'll put it on my feed every N days.