Module for parsing shopping lists and dinner menus and compiling shopping lists.
groceries Tools for parsing human readable shopping lists and recipe ingredients.
pip install groceries-tobiasli
groceries contains a set of classes that solve a lot of shopping and food-related problems:
Ingredientis a container for a food item, and parses amount, unit and item name from an arbitrary string. The base structure for an
Optional[amount] Optional[unit] grocery_name, Optional[comment].
GroceryListis a container for
Ingredientsand handles summation of all ingredients, as well as algebra.
Cookbookis a container for
Recipe, and make them searchable.
Menuis the class returned when you use a
Cookbookto parse an actual, typed shopping list. It contains the recipes and ingredients that are parsed from the shopping list.
Ingredient is a class that takes any arbitrary string describing an
amount of an grocery item. The amount and unit is generalized and with
the formatting in
groceries the unit can be represented in
from groceries import Ingredient print(repr(Ingredient('10 2/3 tbs soy sauce'))) # <Ingredient object: 1.60 dl soy sauce: <Unit: volume: [liter, litre, liters, ...]>>
To simply get the most reasonable representation of the
simply convert it to a string:
print(Ingredient('302.3949133 grams baked beans')) # 1 lbs baked beans
GroceryList is the base component for most of the functionality in
GroceryList accepts groceries
as strings on a human readable format. They are added to a
from groceries import GroceryList gl = GroceryList() gl.add_ingredients([ '2 pounds sugar', '2 kg sugar', 'chocolate', '1/4 floz foo', '1 2/9 tbs foo' ]) print(gl) # <GroceryList object: 3 ingredients # chocolate, # 0.26 dl foo, # 2907.18 g sugar # >
GroceryList instances can be added, subtracted with other
GroceryLists. They can also be multiplied with skalars.
gl = gl - GroceryList(ingredients=['953.5 g sugar', 'chocolate']) * 2 print(gl) # <GroceryList object: 2 ingredients # 0.26 dl foo, # 1.00 kg sugar # >
Recipe and Cookbooks
GroceryList class is used to represent ingredients in recipes.
Recipe is a class that contains information
on how to cook a specific meal. You can have multiple
Recipes and add them to a
The recipes are searchable both on name and tags.
# Demo scripts for grocery readme. from groceries import Recipe, Cookbook recipe1 = Recipe( name='Carbonara', tags=['pasta', 'fast', 'egg', 'bacon'], time=20, serves=2, how_to='''Cook pasta. As pasta is preparing, fry bacon. When bacon is done, add frozen pees and continue frying until pees are cooked. Mix finished pasta with bacon and pees. Add eggs and grated parmesan and stir. Season with salt and pepper.''', ingredients=[ '150 g spaghetti', '100 g bacon', '100 g frozen green pees', '2 eggs', '50 g parmesan', 'salt', 'pepper' ]) recipe2 = Recipe(name="Mac'n cheese", tags=['pasta', 'fast'], time=5, serves=2, how_to='''Cook mac. Add cheese. serve.''', ingredients=['150 g maccaroni', '100 g cheese', ]) recipe3 = Recipe(name='Chocolate', tags=['sweet', 'dessert'], time=2, serves=2, how_to='''Eat chocolate.''', ingredients=['200 g chocolate']) cookbook = Cookbook(recipes=[recipe1, recipe2, recipe3]) # Accepts fuzzy string matching: print(cookbook.find_recipe('mac cheese')) # <Recipe object: Mac'n cheese> # Mac'n cheese is the first match for pasta, but searches are cycling. # So when performing a category match again you won't be presented # with the same recipe again: print(cookbook.find_recipe('pasta')) # <Recipe object: Carbonara>
Menu is a class for parsing an entire weeks worth of shopping,
with syntax for meals on specific days as well as regular groceries.
# Continuation from previous code block. menu = cookbook.parse_menu('''Monday: mac cheese Tuesday: sweet Wednesday: pasta 2 tbs coffee 1 floz baked beans 1 banana 2 banana 4 liters coffee''') print(menu.generate_processed_menu_str()) # Monday: Mac'n cheese til 2 # Tuesday: Chocolate til 2 # Wednesday: Carbonara til 2 # 0.30 dl coffee # 0.30 dl baked beans # 1 banana # 2 banana # 4 l coffee print(menu.groceries) # <GroceryList object: 13 ingredients # 100 g bacon, # 0.30 dl baked beans, # 3 banana, # 100 g cheese, # 200 g chocolate, # 4.03 l coffee, # 2 eggs, # 100 g frozen green pees, # 150 g maccaroni, # 50 g parmesan, # pepper, # salt, # 150 g spaghetti # >
groceries has built in functionality to change whatever configuration
defines the units, ingredient rules and formatting.
To change a particular config, either
- modify an existing config at runtime,
- use one of the other supplied configs, or
- create your own from one of the
To finally set a specific config, use
from groceries import config, language print(config.language.language_name) # 'English' config.set_config(language.norwegian.language) print(config.language.language_name) # 'Norwegian'
A special condition applies if you are changing unit configs.
Changing unit config
For Units, specifically, we need to reload the unit definition if the
config relating to unit handling is changed. This is done via
from groceries import config, configs, units, Ingredient print(Ingredient('2 lbs butter')) # 2 lb butter
But we want to force a different config for units. We want to use a
purely metric unit definition that will always format
To do that we have to find the unit definition that we want, and set that config. Since we are changing the units, we also have to reload the units.
The new formatting will yield metric, as inches is removed from the formatting definition.
print(Ingredient('2 lb butter')) # 907.18 g butter
So, happy shopping!
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