CODEWITHSUNDEEP
pythonlist
user16687093
user16687093

Reputation:

How to know if a value exists in three separate lists?

If I have three lists of strings like the below how do I iterate through the list in order to identity if a specified ingredient say 'banana' is in any of the lists? I need to define a function that outputs either true or false.

menu = [
         ['soup','onion','potato','leek','celery'],
         ['pizza','bread','tomato','cheese','cheese'],
         ['banana']
       ]

Upvotes: 1

Views: 95

Answers (2)

troy
troy

Reputation: 46

Credit to @ThePyGuy for the logic, but here is a very similar answer, defined as a function.

def check_menu(item, menu):
    if any(item in v for v in menu):
        return True
    else:
        return False 

print(check_menu('banana',menu))
True
print(check_menu('mushroom',menu))
False

This way you can have it check whatever menu, or item in the menu you want.

Upvotes: 0

ThePyGuy
ThePyGuy

Reputation: 18406

You need to check in each of the sub-lists, you can use any built-in passing the generator expression

>>> any('banana' in v for v in menu)
True

Upvotes: 7

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