Complete the FoodItem class by adding a constructor to initialize a food item. The constructor should initialize the name to "None" and all other instance attributes to 0.0 by default. If the constructor is called with a food name, grams of fat, grams of carbohydrates, and grams of protein, the constructor should assign each instance attribute with the appropriate parameter value. The given program accepts as input a food item name, fat, carbs, and protein and the number of servings. The program creates a food item using the constructor parameters' default values and a food item using the input values. The program outputs the nutritional information and calories per serving for both food items.
OOPs
In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.
Constructor
The easiest way to think of a constructor in object-oriented programming (OOP) languages is:
Complete the FoodItem class by adding a constructor to initialize a food item. The constructor should initialize the name to "None" and all other instance attributes to 0.0 by default. If the constructor is called with a food name, grams of fat, grams of carbohydrates, and grams of protein, the constructor should assign each instance attribute with the appropriate parameter value.
The given program accepts as input a food item name, fat, carbs, and protein and the number of servings. The program creates a food item using the constructor parameters' default values and a food item using the input values. The program outputs the nutritional information and calories per serving for both food items.
Ex: If the input is:
M&M's
10.0
34.0
2.0
1.0
where M&M's is the food name, 10.0 is the grams of fat, 34.0 is the grams of carbohydrates, 2.0 is the grams of protein, and 1.0 is the number of servings, the output is:
Nutritional information per serving of None:
Fat: 0.00 g
Carbohydrates: 0.00 g
Protein: 0.00 g
Number of calories for 1.00 serving(s): 0.00
Nutritional information per serving of M&M's:
Fat: 10.00 g
Carbohydrates: 34.00 g
Protein: 2.00 g
Number of calories for 1.00 serving(s): 234.00
Code that needs to be changed:
class FoodItem: input()
# TODO: Define constructor with parameters to initialize instance
# attributes (name, fat, carbs, protein)
def get_calories(self, num_servings):
# Calorie formula
calories = ((self.fat * 9) + (self.carbs * 4) + (self.protein * 4)) * num_servings;
return calories
def print_info(self):
print('Nutritional information per serving of {}:'.format(self.name))
print(' Fat: {:.2f} g'.format(self.fat))
print(' Carbohydrates: {:.2f} g'.format(self.carbs))
print(' Protein: {:.2f} g'.format(self.protein))
if __name__ == "__main__":
food_item1 = FoodItem()
item_name = input()
amount_fat = float(input())
amount_carbs = float(input())
amount_protein = float(input())
food_item2 = FoodItem(item_name, amount_fat, amount_carbs, amount_protein)
num_servings = float(input())
food_item1.print_info()
print('Number of calories for {:.2f} serving(s): {:.2f}'.format(num_servings,
food_item1.get_calories(num_servings)))
print()
food_item2.print_info()
print('Number of calories for {:.2f} serving(s): {:.2f}'.format(num_servings,
food_item2.get_calories(num_servings)))
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