CODEWITHSUNDEEP
pythonpython-turtle
Yok Artık
Yok Artık

Reputation: 51

Is there another way to choose blue and red color one by one?

It's coded to go from 100 to 0 radius circles one by one like red, blue, red, blue. I did it with if else but I am sure I can do that in a more advanced way like random,lists or whatever. Can you help with that?

import turtle
screen = turtle.Screen()
turtle = turtle.Turtle('turtle')
turtle.pensize(3)
turtle.pencolor('red')
def circle(x, y, r):
    if r <= 0:
        return
    turtle.penup()
    turtle.goto(0, -r)
    turtle.pendown()
    turtle.circle(r)
    if (turtle.pencolor() == 'red'):
        turtle.pencolor('blue')
    else:
        turtle.pencolor('red')
    circle(0, 0, r-10)

circle(0, 0, 100)
screen.exitonclick()

Upvotes: 1

Views: 96

Answers (2)

ThisClark
ThisClark

Reputation: 14823

Instead of 4 lines for if-else, you can use a ternary operator to set color in one line:

color = "red" if turtle.pencolor() == "blue" else "blue"
turtle.pencolor(color)

It saves a few lines but it doesn't really optimize anything compared to yours.

Upvotes: 0

user2390182
user2390182

Reputation: 73460

You can use itertools.cycle to, well, cycle through the colors:

from itertools import cycle

colors = cycle(["red", "blue"])

# ...
def circle(...):
    turtle.pencolor(next(colors))  # will assign alternating values
    # ...

Upvotes: 5

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