How to iterate through a dictionary to get values on the lowest level?

Question

Please help me understand how to extract the value of each ingredient for each product and do something with it. But for starters I just want to print them all one by one.

MENU = {
    "product_1": {
        "ingredients": {
            "ingredient_1": 50,
            "ingredient_2": 18
        },
        "cost": 1.5
    },
    "product_2": {
        "ingredients": {
            "ingredient_1": 200,
            "ingredient_2": 150,
            "ingredient_3": 24
        },
        "cost": 2.5
    }
}

I started with this code:

for ingredient in MENU:
   print(MENU["product_2"]["ingredients"])

but this prints out all 3 ingredients with their values for product_2 3 times. I need it to print out 200, 150, 24

Answer 1

If you want all values, iterate over them as a hierarchy.

for products in MENU:
    for key,value in MENU[products]["ingredients"].items():
        print(value)

Check out this explanation about dictionaries in python with examples

Answer 2

You need to get the value from the iterated dictionary keys:

for ingredient in MENU:
   print(MENU[ingredient]["ingredients"].values())

Or if you just want from product_2:

print(MENU["product_2"]["ingredients"].values())

If you want the keys:

print(list(MENU["product_2"]["ingredients"]))

Or:

print(MENU["product_2"]["ingredients"].keys())

Answer 3

As @John commented:

You need to get familiarized yourself with dictionary:

for key,value in MENU["product_2"]["ingredients"].items():
  print(value)

or

for x in MENU["product_2"]["ingredients"].values():
  print(x)

Output

200
150
24

If you just need a list:

list(MENU["product_2"]["ingredients"].values())
#[200, 150, 24]