Clean up your code

Code should be easy to read and understand.

Make sure your code runs like you think it does

Code should run from the start of the file to the end of the file without problems. To make sure this is true:

Work with data files appropriately

Code should run the same way regardless of which computer it is run on. In order to grade your code someone will need to run it on another computer. To make sure your code will work on another computer: