I looked at your initial post and at your sample code and decided the file looks something like this:
red, 15, 200
blue, 150, 200
green, 300, 200
orange, 150, 200
black, 300, 200
red, 150, 200
blue, 300, 200
green, 150, 200
Each line in the file resulting in a turtle drawing a line. I changed some of the colors so it was easier for me to tell which line in the file matches which line in the drawing.
I wrote the simples program to draw the image. It draws a four pointed star.
import turtle
t = turtle.Turtle()
with open('test.txt') as file:
for line in file:
color, angle, x = line.split(',')
t.pencolor(color.strip())
t.right(int(angle))
t.forward(int(x))
What I think you are asking for is some way to make this program a bit more robust. My program crashes if there are less that three values in a line.
Error:
Traceback (most recent call last):
File "...", line 7, in <module>
color, angle, x = line.split(',')
ValueError: not enough values to unpack (expected 3, got 2)
It also crashes if the angle or distance are not integers.
Error:
Traceback (most recent call last):
File "...", line 10, in <module>
t.forward(int(x))
ValueError: invalid literal for int() with base 10: ' 200.1\n'
And it crashes if the file contains a color name that isn't known to Turtle.
Error:
Traceback (most recent call last):
File "...", line 8, in <module>
t.pencolor(color.strip())
File "C:\Program Files\Python38\lib\turtle.py", line 2252, in pencolor
color = self._colorstr(args)
File "C:\Program Files\Python38\lib\turtle.py", line 2696, in _colorstr
return self.screen._colorstr(args)
File "C:\Program Files\Python38\lib\turtle.py", line 1158, in _colorstr
raise TurtleGraphicsError("bad color string: %s" % str(color))
turtle.TurtleGraphicsError: bad color string: hubbabubble
I am beginning to understand that your job is to handle these errors and maybe do something a little more graceful. You could attack that problem by verifying the strings before using them as colors or numbers, or you could us try/except to catch the errors when they occur.
Sorry about the cartesian/polar misdirection. That was heading off in a completely wrong direction.