Graded Homework 4

**Grade: 4.5/5**

Excellent work, Julian! I was impressed with the efficiency of the `build_random_function`. You pretty much nailed that one right on the head. Also, great work making use of other Python tools (`time` module) to improve your workflow. I'm generally impressed.

Once you've read the comments (both on the PR and under files changed), make a comment to the pull request or send me/Diana an email, letting us know that you've checked them out. Afterwards, close the PR (and optionally delete the graded branch)

#### REMEMBER NOT TO MERGE THESE PRs!