The first thing we need to do when we wish to use a module is perform an import. In the example above, the statement import turtle creates a new name, turtle, and makes it refer to a module object. This looks very much like the reference diagrams we saw earlier for simple variables.
In order to use something contained in a module, we use the dot notation, providing the module name and the specific item joined together with a “dot”. For example, to use the Turtle class, we say turtle.Turtle. You should read this as: “In the module turtle, access the Python element called Turtle”.