Re: [Tutor] help with colormode
On 25/04/2019 11:54, Mark Alderson wrote:
> tried screen.colormode(255)
Peter has shown you how to make that work but
there is a wee issue below I need to point out.
> -code-
> from turtle import Turtle
> t = Turtle()
> t.speed(0)
>
> b = 180
> a = 35
>
> colormode(255)
>
> t.color((55,55,55))
> for i in range(200):
> t.circle(i,a)
> t.right(b)
> t.circle(i,a)
>
>
> #input('Press any key to continue...')
>
> -
>
> ===error===
> Traceback (most recent call last):
> File "H:\python\snowflake.py", line 9, in
> screen.colormode(255)
> NameError: name 'screen' is not defined
> ===
The error message clearly does not reflect the code above.
In this case its not too bad but in more complex questions
it is very important that you send the actual code that
generates the error. Otherwise we wind up just guessing
at what might be the problem.
Just something for future reference.
Regards from Stirling,
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos
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Re: [Tutor] help with colormode
Mark Alderson wrote:
> hi
>
> Ihave a very small program. I want to cycle colours. I cant set the
> colormode from 1 to 255
>
> tried screen.colormode(255)
>
> tells me screen is not defined. the program works without the colormode,
> but i want to use it.
>
> I just change the a and b variable values to generate new art.
>
> -code-
> from turtle import Turtle
> t = Turtle()
> t.speed(0)
>
> b = 180
>
> a = 35
>
> colormode(255)
>
> t.color((55,55,55))
> for i in range(200):
> t.circle(i,a)
> t.right(b)
> t.circle(i,a)
>
>
> #input('Press any key to continue...')
>
> -
>
> ===error===
> Traceback (most recent call last):
> File "H:\python\snowflake.py", line 9, in
> screen.colormode(255)
> NameError: name 'screen' is not defined
> ===
The only name you import is Turtle, so you only have that (and the built-
ins). Fortunately you can get the screen from the Turtle, so:
from turtle import Turtle
ninja = Turtle()
ninja.speed(0)
screen = ninja.screen
screen.colormode(255)
b = 180
a = 35
for i in range(200):
ninja.color((i + 55, 55, 55))
ninja.circle(i, a)
ninja.right(b)
ninja.circle(i, a)
screen.exitonclick()
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[Tutor] help with colormode
hi
Ihave a very small program. I want to cycle colours. I cant set the colormode
from 1 to 255
tried screen.colormode(255)
tells me screen is not defined. the program works without the colormode, but i
want to use it.
I just change the a and b variable values to generate new art.
-code-
from turtle import Turtle
t = Turtle()
t.speed(0)
b = 180
a = 35
colormode(255)
t.color((55,55,55))
for i in range(200):
t.circle(i,a)
t.right(b)
t.circle(i,a)
#input('Press any key to continue...')
-
===error===
Traceback (most recent call last):
File "H:\python\snowflake.py", line 9, in
screen.colormode(255)
NameError: name 'screen' is not defined
===
any help would be appreciated,
thanks
Mark
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