text: from book import Book
  from recipe import Recipe
  from datetime import datetime
  
  om = Recipe('Omelette', 1, 5, ['Eggs', 'Cooking oil'], 'La ghla 3la mskin',
              'starter')
  dinner = Recipe('Chicken', 4, 60, ['Chicken breast', 'Vegetables'],
                  'La ghla 3la mskin', 'lunch')
  recipe_book = Book('Paleo', datetime(2021, 1, 19), datetime(2021, 1, 17),
                     {'starter': [om], 'lunch': [], 'dessert': []})
  recipe_book.get_recipes_by_types('starter')
  recipe_book.get_recipe_by_name('Omelette')
  recipe_book.add_recipe(dinner)
  print(recipe_book.last_update)
  ret = recipe_book.get_recipe_by_name('Chicken')
  recipe_book.get_recipes_by_types('lunch')
  