#!/usr/bin/env python

# -*- coding: utf-8 -*-

class Model(object):

products = {

'milk': {'price': 1.50, 'quantity': 10},

'eggs': {'price': 0.20, 'quantity': 100},

'cheese': {'price': 2.00, 'quantity': 10}

}

class View(object):

def product_list(self, product_list):

print('PRODUCT LIST:')

for product in product_list:

print(product)

print('')

def product_information(self, product, product_info):

print('PRODUCT INFORMATION:')

print('Name: %s, Price: %.2f, Quantity: %d\n' %

(product.title(), product_info.get('price', 0),

product_info.get('quantity', 0)))

def product_not_found(self, product):

print('That product "%s" does not exist in the records' % product)

class Controller(object):

def __init__(self):

self.model = Model()

self.view = View()

def get_product_list(self):

product_list = self.model.products.keys()

self.view.product_list(product_list)

def get_product_information(self, product):

product_info = self.model.products.get(product, None)

if product_info is not None:

self.view.product_information(product, product_info)

else:

self.view.product_not_found(product)

if __name__ == '__main__':

controller = Controller()

controller.get_product_list()

controller.get_product_information('cheese')

controller.get_product_information('eggs')

controller.get_product_information('milk')

controller.get_product_information('arepas')

### OUTPUT ###

# PRODUCT LIST:

# cheese

# eggs

# milk

#

# PRODUCT INFORMATION:

# Name: Cheese, Price: 2.00, Quantity: 10

#

# PRODUCT INFORMATION:

# Name: Eggs, Price: 0.20, Quantity: 100

#

# PRODUCT INFORMATION:

# Name: Milk, Price: 1.50, Quantity: 10

#

# That product "arepas" does not exist in the records