Python for Kids, 2nd Edition

7Recycling Your Code with Functions and Modules

Think about how much stuff you throw away each day: water bottles, soda cans, potato chip bags, plastic sandwich wrappers, bags that held carrot sticks or apple slices, shopping bags, newspapers, magazines, and so on. Now imagine all of that trash just got dumped in a pile at the end of your driveway, without separating out the paper, the plastic, and the tin cans.

You probably recycle as much as possible, which is good, because no one likes to climb over a pile of trash on the way to school. Rather than sitting in an enormous, gross pile, recycled glass bottles are melted down and turned into new ...