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Python

Jose Luis Lopez
Jose Luis Lopez
19,179 Points
Posted by Jose Luis Lopez
Jose Luis Lopez
19,179 Points

coordinates plane python

hello team treehouse community.

I'm currently working on a python program for my class CSC 110. The professor want us to draw a x, y axes with black and a background grid on blue. so my question is,

what can I do so the blue lines wont over draw on top of the x, y black axes. just the one in the center. I was thinking on a if statement but I'm not sure.

Jose Luis Lopez
Jose Luis Lopez
19,179 Points
Jose Luis Lopez
Jose Luis Lopez
19,179 Points 
#myPython code
import turtle
import math

wn = turtle.Screen()  # setup screen and its attributes
tess = turtle.Turtle()  # sets tess
wn.title("Coordinate axis")
tess.speed(1)


def draw_axis(s):
    # draws x, y axis
    tess.setpos(0, 0)
    tess.color("black")
    tess.pensize(5)
    for i in range(4):
        tess.fd(s)
        tess.pu()
        tess.goto(0, 0)
        tess.pd()
        tess.lt(90)
    tess.ht()


def horizontal_lines(s):
    # draw horizontal lines
    x = -300
    for y in range(-300, 300 + 1, 25):
        tess.pu()
        turtle.pu()
        turtle.goto(x, y)
        turtle.pd()
        turtle.color("lightblue")
        turtle.pensize(3)
        turtle.fd(s)


def vertical_lines(s):
    # draw vertical lines
    y = 300
    turtle.right(90)
    for x in range(-300, 300 + 1, 25):
        turtle.pu()
        turtle.goto(x, y)
        turtle.pd()
        turtle.color("lightblue")
        turtle.pensize(3)
        turtle.fd(s)




draw_axis(300)
horizontal_lines(600)
vertical_lines(600)

[MOD: corrected ```python formatting -cf]

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,423 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

The drawing order may answer your question. Draw the horizontal and vertical lines first, then draw the black axis. So change the order of the last three lines:

horizontal_lines(600)
vertical_lines(600)
draw_axis(300)