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Python

Posted by Daniel Lee
Daniel Lee
68 Points

How do I create a line instance that draws a line from the Line Class I created?

import turtle

<p>
class Line(object):

    def __init__(self, start = (0,0), end = (50,50),
                 pencolor = 'black', pensize = 1):
        self.start = start
        self.end = end

    def __str__(self):
        return('Line(beg:{},end:{}'.format(self.beg,self.end))

    def draw(self):
        self.pensize(self.pensize)
        self.pencolor(self.pencolor)
        self.up()
        self.goto(self.beg)
        self.down()
        self.goto(self.end)

def main():
    turtle.setup(700,400, startx = 0, starty = 0)
    line = Line()
    line.draw()
    turtle.done()
main() </p>

Here's the code. I'm getting an error saying that the line attribute has no attribute pensize.

1 Answer

Daniel Lee
Daniel Lee
68 Points
Daniel Lee
Daniel Lee
68 Points

Found it! I just had to replace the pen argument with t = turtle in the draw method. 

<p>
import turtle

class Line(object):

    def __init__(self, start = (0,0), end = (50,50),
                 pencolor = 'black', pensize = 1):
        self.beg = start
        self.end = end
        self.pensize = pensize
        self.pencolor = pencolor

    def __str__(self):
        return('Line(beg:{},end:{}'.format(self.beg,self.end))

    def draw(self, t = turtle):
        t.pensize(self.pensize)
        t.pencolor(self.pencolor)
        t.up()
        t.goto(self.beg)
        t.down()
        t.goto(self.end)

def main():

    line = Line()
    line.draw()
    turtle.done()
main()
</p>