The string library would be stored in a file called string.py . Many papers uses the terms class and class instance. I don't like them because they can be hard to understand. I will use classes and objects instead in this article. Class is well, class, and object is what you create from the class.
Object is run-time.
This is how you declare an empty class. Of course, the object does nothing at this point. 20 Notice that you are actually assigning a new variable to an object. It would be the end of the world before Java allows you to do this. Imagine what you can do with this feature.