Session Seven, Wed. January 28th

On Monday we began with the concept of looping over all the pixels in a picture by looking at code such as:

def redOnly(pic):
	for pixel in getPixels(pic):
		setGreen(pixel,0)
		setBlue(pixel,0)
	repaint(pic)

Let's start today by talking about what goes on in that line that says "for"

• The python "for" loop works on objects in a list. 
• getPixels() returns a list of all the pixels
• The loop goes over that list one element at a time, temporarily storing it in a variable called pixel

Questions about yesterday's lab  ??

Points I tried to make in the lab:

• What happens when you increase a color channel beyond it's limits (either up or down)?
• What differences do you observe with the two versions of makeSunset() ?

What kinds of things did you try with the bonus problem? 

What challenges did you experience?