Question

Python Classes - Write a class to determine the price of a salad and its ingredients.

Write a Salad class. Your class will have two attributes: • name, which should be a string containing the name of the person who ordered the salad. • ingredients, which should be a set of strings where each string is an ingredient in the salad.

__init__() The Salad class should have an __init__() method with four parameters, in the following order: • self • the name of the person • a set of ingredients to add to the base ingredients of the salad (including things from the protein, extra toppings, and dressings categories above). This should be an optional parameter with a default value of None. A value of None means not to add any additional ingredients. • a set of base ingredients to omit from the salad. This should be an optional parameter with a default value of None. A value of None means not to omit any ingredients (in other words, to include all the base ingredients). The __init__() method should set the name attribute to the name specified in the second parameter. It should set the ingredients attribute to contain exactly the ingredients that should go in the salad (including the nonomitted base ingredients). For example, if the user says to add "falafel", "apples", "cashews", and "citrus" and omit "onions" and "carrots", the value of ingredients should be {"greens", "tomatoes", "cucumbers", "falafel", "apples", "cashews", "citrus"} (the base ingredients the user didn't omit, plus the additional ingredients the user added). It's possible that users will provide invalid values in either the set of ingredients to add or the set of ingredients to omit. You do not need to validate the values of these sets in the __init__() method. • If the user says to omit things that are not base ingredients (including other ingredients on the menu or things that are not on the menu), ignore those things; only omit actual base ingredients. For example, if the set of things to omit includes "corn", ignore it because corn is not a base ingredient. • If the user says to omit an ingredient and they also say to add the same ingredient, include the ingredient in the value of ingredients. • If the user says to add things that are not ingredients on the menu, go ahead and add those things to the value of the ingredients attribute. For example, if the set of things to add includes "walnuts", then the value of ingredients should include "walnuts". Hint: the ingredients attribute is a set. So are the values of the parameters for ingredients to add to the salad and base ingredients to omit (unless they are None, in which case you can convert them to empty sets). Set operations can help you build up the ingredients attribute quickly and efficiently. Think about which operation can help you omit items from a set, and which operation can help you combine two sets.

get_price() The Salad class should have a get_price() method that calculates the price of the order. An order with no ingredients should have a price of 0 dollars. Most other orders will have a price of 8 dollars. Add one dollar each for "shrimp" and "cashews", if they are in ingredients. Return the price in dollars as an integer (e.g., 8).

is_vegan() The Salad class should have an is_vegan() method that returns False if the ingredients attribute contains non-vegan ingredients, and True otherwise. As a reminder, non-vegan ingredients are "chicken", "shrimp", "feta", and "ranch".

Answer 1

 class Salad: def __init__(self, name, adds=None, omits=None): self.name = name self.ingredient = set() self.ingredient.difference_update(set(omits)) self.ingredient.update(set(adds)) def get_price(self): price=8 for item in self.ingredient: if item in ["shrimp","cashews"]: price = price + 1 else: price=0 return price def is_vegan(self): flag = true for item in self.ingredient: if item in ["chicken","shrimp","feta","ranch"]: flag = false break return flag