code the purchaseable order and builder class. Assignment Instructions

For this assignment, you will be creating classes based on the UML diagram below. One class, the Pizza class, has code included in the instructions that you can use. Additional Information:

To be able to use the Purchasable class $($and its subclasses$)$ as a key in a dictionary it will be necessary to override the $\_\_$eq$\_\_$ and $\_\_$hash$\_\_$ methods within that class. The $\_\_$eq$\_\_$ method can consider two Purchasables equivalent if they have the same name and the same cost. The $\_\_$hash$\_\_$ method can return a hash $($use Python's hash function$)$ of a tuple containing the name and cost of the purchasable.

You should create all of the other classes described in the UML Diagram. Sodas can have two sizes $(\text{'}20$ oz$\text{'}$ and $\text{'}2$ Liter'$)$ and can be one of these flavors: 'Coke', 'Sprite', $\text{'}$Mt$.$ Dew', 'Root Beer', 'Orange', 'Grape'. For calculating the cost of a soda, the base cost for a $\text{'}20$ oz$\text{'}$ Soda is $$1\mathrm{.}50$ and for a $\text{'}2$ Liter' $$2\mathrm{.}50$ and an additional $$0\mathrm{.}50$ if it's a premium Soda which is one of 'Coke', 'Sprite', or $\text{'}$Mt$.$ Dew'.

For the PizzaFactory class you can broadly decide the exact toppings for the different pizzas. Each factory method should assign a name to the constructed Pizza object so that it doesn't have the "Custom Size Pizza" name assigned to it$.$

The LineItemIterator class for the Order class should iterate over lines in an order and produce output that looks similar to the following: