Use your Food class, utilities code, and sample data from Lab 1 to complete the following Tasks.

def by_origin(foods, origin): """ ------------------------------------------------------- Creates a list of foods by origin. foods is unchanged. Use: v = by_origin(foods, origin) ------------------------------------------------------- Parameters: foods - a list of Food objects (list of Food) origin - a food origin (int) Returns: origins - Food objects from foods that are of a particular origin (list of Food) ------------------------------------------------------- """

your code

here is the data

Ravioli, 7, False, 246

here is the Food class page

class Food: """ Defines an object for a single food: name, origin, vegetarian, calories. """ # Constants ORIGIN = ("Canadian", "Chinese", "Indian", "Ethiopian", "Mexican", "Greek", "Japanese", "Italian", "American", "Scottish", "New Zealand", "English")

@staticmethod def origins(): """ ------------------------------------------------------- Creates a string list of food origins in the format: 0 Canadian 1 Chinese 2 Indian ... Use: s = Food.origins() Use: print(Food.origins()) ------------------------------------------------------- Returns: string - A numbered list of valid food origins. ------------------------------------------------------- """ string = ""

for i in range(len(Food.ORIGIN)): string += """{:2d} {} """.format(i, Food.ORIGIN[i]) return string

# your code here

return string

def __init__(self, name, origin, is_vegetarian, calories): """ ------------------------------------------------------- Initialize a food object. Use: f = Food( name, origin, is_vegetarian, calories ) ------------------------------------------------------- Parameters: name - food name (str) origin - food origin (int) is_vegetarian - whether food is vegetarian (boolean) calories - caloric content of food (int >= 0) Returns: A new Food object (Food) ------------------------------------------------------- """ assert origin in range(len(Food.ORIGIN)), "Invalid origin ID" assert is_vegetarian in (True, False, None), "Must be True or False" assert calories is None or calories >= 0, "Calories must be >= 0"

self.name = name self.origin = origin self.is_vegetarian = is_vegetarian self.calories = calories return

def __str__(self): """ ------------------------------------------------------- Creates a formatted string of food data. Use: print(f) Use: s = str(f) ------------------------------------------------------- Returns: string - the formatted contents of food (str) ------------------------------------------------------- """ string = """Name: {} Origin: {} Vegetarian: {} Calories: {}""".format(self.name, Food.ORIGIN[self.origin], self.is_vegetarian, self.calories)

# your code here

return string

def __eq__(self, rs): """ ------------------------------------------------------- Compares this food against another food for equality. Use: f == rs ------------------------------------------------------- Parameters: rs - [right side] food to compare to (Food) Returns: result - True if name and origin match, False otherwise (boolean) ------------------------------------------------------- """ result = (self.name.lower(), self.origin) == ( rs.name.lower(), rs.origin) return result

def __lt__(self, rs): """ ------------------------------------------------------- Determines if this food comes before another. Use: f < rs ------------------------------------------------------- Parameters: rs - [right side] food to compare to (Food) Returns: result - True if food precedes rs, False otherwise (boolean) ------------------------------------------------------- """ result = (self.name.lower(), self.origin) < \ (rs.name.lower(), rs.origin) return result

def __le__(self, rs): """ ------------------------------------------------------- Determines if this food precedes or is or equal to another. Use: f <= rs ------------------------------------------------------- Parameters: rs - [right side] food to compare to (Food) Returns: result - True if this food precedes or is equal to rs, False otherwise (boolean) ------------------------------------------------------- """ result = self < rs or self == rs return result

def write(self, file_variable): """ ------------------------------------------------------- Writes a single line of food data to an open file. Use: f.write(file_variable) ------------------------------------------------------- Parameters: file_variable - an open file of food data (file) Returns: The contents of food are written as a string in the format name|origin|is_vegetarian to file_variable. ------------------------------------------------------- """ print("{}|{}|{}|{}" .format(self.name, self.origin, self.is_vegetarian, self.calories), file=file_variable) return

def key(self): """ ------------------------------------------------------- Creates a formatted string of food key data. Use: key = f.key() ------------------------------------------------------- Returns: the formatted contents of food key (str) ------------------------------------------------------- """ return "{}, {}".format(self.name, self.origin)

def __hash__(self): """ ------------------------------------------------------- Generates a hash value from a food name. Use: h = hash(f) ------------------------------------------------------- Returns: value - the total of the characters in the name string (int > 0) ------------------------------------------------------- """ value = 0

for c in self.name: value = value + ord(c) return value