grading hw4

[dianavermilya]

Grade 5/5

Hi Kevin, looks great. Remember to put your name on the file and take out the '#add your code here' here.

[ksuzy31]

thanks diana

[abekim]

One thing in your evaluate_random_function. I personally recommend using if...elif...else statements. From a reader's perspective, this tells them that you're matching for patterns with a single element.

This next part doesn't really apply to your code, but if you had written:

def evaluate_random_function(f, x, y):
    d = f[0]
    if d == 'x':
        res = x
    if d == 'y':
        res = y
    ...
    return res

then Python will evaluate each one of your if statements even if it finds a match (ie. f = ['x']). If you use if...elif, Python will know to stop once it's found a match. Let me know if this makes sense!