Write a function to put 10 pixel wide “prison cell bars” on the left border, center, and right border of an input picture.

Question

What will be an ideal response?

Answer 1

```
def prisonbars(picture, lineColor):
width = getWidth(picture)
center = width/2
for p in getPixels(picture):
x = width-getX(p)

if x<10:
setColor(p,lineColor)
elif x>width-11:
setColor(p,lineColor)

if (x>center-5) and (x setColor(p,lineColor)
```

Note: The question does not specify that a line color should be passed in, so one can just write a function that always uses the same color.

Additionally the middle bar is difficult to get at exactly ten pixels across and centered. The above is one way to ensure that the bar is ten pixels across, but it will only be centered in certain images with uneven widths. Another solution that is not stringent concerning the ten pixels across but will always be centered is:

```
def prisonbars(picture, lineColor):
width = getWidth(picture)
center = width/2
for p in getPixels(picture):
x = width-getX(p)

if x<10:
setColor(p,lineColor)
elif x>width-11:
setColor(p,lineColor)

difference = abs(center-x)
difference = abs(difference)

if difference<6:
setColor(p,lineColor)
```