This list stores a set of numbers with the person’s first name used as the key. This could be a handy way to quickly grab phone numbers of friends. We can then retrieve the value based on the key: ...

Working with files in Python is pretty easy. But there’s a common mistake that can sneak into your code. Not closing the file ...

The main reason to use Python is that you get a lot more options than what's included in most spreadsheets. Spreadsheets are ...