hi, i want to be able to draw two eyes with are exactly the same in radius and colour etc next to eachother. So when i open the window the pair of eyes are there in the centre. I have managed to get one eye but i dnt have a clue to how to get one beside it, i am not sure hw to.. here is my code for the first eye and function should be calling the drawCircle six times.

``````from graphics import *
import math
circle.setFill(colour)
circle.setWidth(2)
circle.draw(win)

def drawTarget():
win = GraphWin()
centre = Point(100,100)
drawCircle(win, centre, 40, "white")
drawCircle(win, centre, 20, "blue")
drawCircle(win, centre, 10, "black")``````

## All 6 Replies

One eye has to be positioned center_left, the other center_right ...

``````from graphics import *
import math

circle.setFill(colour)
circle.setWidth(2)
circle.draw(win)

def drawTarget():
win = GraphWin()
centre_left = Point(50,100)
centre_right = Point(150,100)
drawCircle(win, centre_left, 40, "white")
drawCircle(win, centre_left, 20, "blue")
drawCircle(win, centre_left, 10, "black")
drawCircle(win, centre_right, 40, "white")
drawCircle(win, centre_right, 20, "blue")
drawCircle(win, centre_right, 10, "black")
# this keeps the window up/open
win.getMouse()

drawTarget()``````

For those who don't know ...

John Zelle, Ph.D. teaches Python at Wartburg College
he is the author of graphics.py used by a number of schools instead
of Tkinter

Here is the graphics module (a thin wrapper for Tkinter) ...
http://mcsp.wartburg.edu/zelle/python/graphics.py
also has a nice documentation ...
http://mcsp.wartburg.edu/zelle/python/graphics/graphics.pdf

Founded in 1852, Wartburg College is a nationally recognized selective
four-year liberal arts college of the Evangelical Lutheran Church in
America.

Wartburg College
100 Wartburg Blvd.
Waverly, IA 50677
(800) 772-2085

"Be Orange"

At this point in time module graphics.py works with Python2 only.
Install graphics.py in your working directory or the Lib/site-packages directory.

but hw would you get them in the exact centre of the graphics window.. is this fine?

``````from graphics import *
import math

circle.setFill(colour)
circle.setWidth(2)
circle.draw(win)

def drawTarget():
win = GraphWin()
centre_left = Point(60,100)
centre_right = Point(140,100)
drawCircle(win, centre_left, 40, "white")
drawCircle(win, centre_left, 20, "blue")
drawCircle(win, centre_left, 10, "black")
drawCircle(win, centre_right, 40, "white")
drawCircle(win, centre_right, 20, "blue")
drawCircle(win, centre_right, 10, "black")
# this keeps the window up/open
win.getMouse()

drawTarget()``````

One way would be to say that the center should be at 1/2 width and height of the drawing window ...

``````from graphics import *

circle.setFill(colour)
circle.setWidth(2)
circle.draw(win)

def drawTarget():
w = 250
h = 250
win = GraphWin("Spooky Eyes", w, h)
# center should be at 1/2 width and height
center_w = w//2
center_h = h//2
centre_left = Point(center_w - 50, center_h)
centre_right = Point(center_w + 50, center_h)
drawCircle(win, centre_left, 40, "white")
drawCircle(win, centre_left, 20, "blue")
drawCircle(win, centre_left, 10, "black")
drawCircle(win, centre_right, 40, "white")
drawCircle(win, centre_right, 20, "blue")
drawCircle(win, centre_right, 10, "black")
# this keeps the window up/open
win.getMouse()

drawTarget()``````

thankyou.. that makes sense nw.. had to tweak code a bit more for my requirements.. thx a lot..

can i quickly just ask a question, would we be able to shrink the code anymore if it was just for one eye?.. as it has repetitive code?

One eye would make it simpler ...

``````from graphics import *

circle.setFill(colour)
circle.setWidth(2)
circle.draw(win)

def drawTarget():
w = 250
h = 250
win = GraphWin("One Spooky Eye", w, h)
# center should be at 1/2 width and height
centre = Point(w//2, h//2)
drawCircle(win, centre, 40, "white")
drawCircle(win, centre, 20, "blue")
drawCircle(win, centre, 10, "black")
# click mouse to go on
win.getMouse()
win.close()

drawTarget()``````

You can streamline the whole thing a little more using a for loop ...

``````# draw one spooky eye in the center of the drawing window
# calculate the center from width, height

from graphics import *

circle.setFill(colour)
circle.setWidth(2)
circle.draw(win)

def drawTarget():
w = h = 250
win = GraphWin("One Spooky Eye", w, h)
# center should be at 1/2 width and height
centre = Point(w//2, h//2)
for radius, color in ((40,"white"), (20,"blue"), (10,"black")):
# click mouse to go on
win.getMouse()
win.close()

drawTarget()``````

Stop before the code gets too cryptic and hard to read and understand.

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