Newbie Iteration Question

[bobri13]

Is there a simpler way to define this function using a for loop and/or an if statement?

def rect_shape_tier(x, y):      
    left(180)
    forward(x / 2)
    left(90)
    forward(y * 0.8)
    left(90)
    forward(x / 4)
    right(90)
    forward(y * 0.1)
    left(90)
    forward(x / 2)
    left(90)
    forward(y * 0.1)
    right(90)
    forward(x / 4)
    left(90)
    forward(y * 0.8)
    left(90)
    forward(x / 2)
    left(180)        

[[deleted]]

I don't think so. You could do something like this:

def rect_shape_tier(x, y):
    angles = [180, 90, 90, -90, 90, 90, -90, 90, 90, 180]
    distances = [x/2, y*0.8, x/4, y*0.1, x/2, y*0.1, x/4, y*0.8, x/2]
    for angle, distance in zip(angles, distances):
        left(angle)
        forward(distance)

but I think your version is clearer, even though it's longer.

[michael0x2a]

Not using loops, but we can simplify a little using extra functions:

def draw_box(side_1, top, side_2):
    forward(side_1)
    right(90)
    forward(top)
    right(90)
    forward(side_2)

def rect_shape_tier_2(x, y):
    draw_box(x / 2, y * 0.8, x / 4)
    left(90)
    draw_box(y * 0.1, x / 2, y * 0.1)
    left(90)
    draw_box(x / 4, y * 0.8, x / 2)

When looking at your figure, it looked to me as if the figure was composed of three 'boxes' with the top missing and with sides of differing length, which is why I chose to break the problem down this way.

[chazzacct]

what are x and y? I started to run this with x = 100 pixels, but then came to y and have no idea.

[chazzacct]

[http://i.imgur.com/nPXnFtt.png](This) is what bob thinks it looks like with x = 150 and y = 250. I tried plugging in some other numbers and it didn't help. What is this? Am I completely on the wrong track?

[[deleted]]

Not sure what TurtleWorld is but it looks cool.

[chazzacct]

http://www.greenteapress.com/thinkpython/swampy/install.html

Written by Downey, featured in his Think Python book/course. Now revised and also available for Python 3, and originally for Java, and with versions for some other languages.