In Python, how to code for searching food names by their ingredients?

March 14, 2022

The below lists food names and ingredients.

Pasta: tomato, onion, parsley, wine, flour.
Lasagna: tomato, beef, cheese, flour, 
Ramen: beef, onion, flour.

I like to find food names by ingredients.

For example, if I like to find food names which has ‘flour’ and ‘onion’, the answer should be ‘Pasta’ and ‘Ramen’.

If I like to find food names which has ‘beef’ and ‘flour’, the answer should be ‘Lasagna’ and ‘Ramen’.

The number of ingredients for searching can be more than two or just one.

Firstly, I tried it with dict, but it did not help. Next, I tried with table, but it was hard because each food has different number of ingredients.

Please help me with this.

EDIT: I am sorry for not including my try. I usually do, but for this question, I have no idea how to use dict. Also I am not even able to generate a table because the number of ingredients are different. The below is my failed attempt.

x = {'Pasta':['tomato', 'onion', 'parsley', 'wine', 'flour'],
     'Lasagna':['tomato', 'beef', 'cheese', 'flour'],
     'Ramen':['beef', 'onion', 'flour']}

test = ['tomato', 'flour']

[k for k in enumerate(x.values()) if test in k]

>Solution :

This works; use a dictionary to keep your ingredients, and then search through values of the dictionary:

db = {"Pasta": ["tomato", "onion", "parsley", "wine", "flour"],
      "Lasagna": ["tomato", "beef", "cheese", "flour"], 
      "Ramen": ["beef", "onion", "flour"] }


test = {"onion","flour"}

for k, v in db.items():
    if test.issubset(set(v)) :
        print(k)