CODEWITHSUNDEEP
pythonerror-handlingattributes
deadalous
deadalous

Reputation: 73

"AttributeError: 'Turtle' object has no attribute 'colormode'" despite Turtle.py having colormode atttribute

I tried running the code that uses the Turtle library on this site, shown here,

import turtle
import random

def main():
    tList = []
    head = 0
    numTurtles = 10
    wn = turtle.Screen()
    wn.setup(500,500)
    for i in range(numTurtles):
        nt = turtle.Turtle()   # Make a new turtle, initialize values
        nt.setheading(head)
        nt.pensize(2)
        nt.color(random.randrange(256),random.randrange(256),random.randrange(256))
        nt.speed(10)
        wn.tracer(30,0)
        tList.append(nt)       # Add the new turtle to the list
        head = head + 360/numTurtles

    for i in range(100):
        moveTurtles(tList,15,i)

    w = tList[0]
    w.up()
    w.goto(0,40)
    w.write("How to Think Like a ",True,"center","40pt Bold")
    w.goto(0,-35)
    w.write("Computer Scientist",True,"center","40pt Bold")

def moveTurtles(turtleList,dist,angle):
    for turtle in turtleList:   # Make every turtle on the list do the same actions.
        turtle.forward(dist)
        turtle.right(angle)

main()

in my own Python editor and I got this error:

turtle.TurtleGraphicsError: bad color sequence: (236, 197, 141)

Then, based on this answer on another site, I added in this line before "nt.color(......)"

nt.colormode(255)

Now it's showing me this error

AttributeError: 'Turtle' object has no attribute 'colormode'

Okay, so I checked my Python library and looked into the contents of Turtle.py. The colormode() attribute is definitely there. What is making the code able to run on the original site but not on my own computer?

Upvotes: 7

Views: 16769

Answers (4)

Malcolm Anderson
Malcolm Anderson

Reputation: 1017

I'll take a crack at answering the question, but Meera's answer is the correct one.

The answer is you don't set the colormode on the class (Turtle), the package (turtle), or the instantiated Turtle object (the variable "nt" in your code).

In your code, you created a screen object (see variable "wn") After you create your screen object, set the colormode on your object.

As stated above in your code you would use the following instruction between lines 7 and 8:

wn.colormode(255)

Upvotes: 0

Winter Morillo
Winter Morillo

Reputation: 1

The problem is that you need to set up the colormode() attribute = 255. The class to reference is Screen(), based on your code you referenced this code as wn = turtle.Screen(). In order for you to make your code work, just by adding the following line of code.

wn.colormode(255)

Upvotes: 0

Meera
Meera

Reputation: 11

Screen class in turtle module has colormode() method. You can call screen_object.colormode(255). In your code it would be:

wn.colormode(255)

Upvotes: 1

Gerrat
Gerrat

Reputation: 29710

The issue is that your Turtle object (nt) doesn't have a colormode method. There is one in the turtle module itself though.

So you just need:

turtle.colormode(255)

instead of 

nt.colormode(255)

Edit: To try to clarify your question in the comment, suppose I create a module called test.py, with a function, and a class, 'Test':

# module test.py

def colormode():
    print("called colormode() function in module test")

class Test
    def __init__(self):
        pass

Now, I use this module:

import test

nt = test.Test()  # created an instance of this class (like `turtle.Turtle()`)
# nt.colormode()  # won't work, since `colormode` isn't a method in the `Test` class
test.colormode()  # works, since `colormode` is defined directly in the `test` module

Upvotes: 9

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