Check if only certain values exist in a list (Python)

Question

I have the following list:

A = [x,y,z]

and I need help with writing a code in Python that returns True if any combination of x or y or z is in the list, but returns False if any other variables outside of A is in the list.

Example:

B = [x]  (return True)
B = [l] (return False)
B = [x,z] (return True)
B = [x,y,z,l] (return False)

You don't actually have a question there. Please read how to ask — Foon, Mar 29 '17 at 11:37

score 1 · Answer 1 · answered Mar 29 '17 at 09:43

1

You can make a set from your list, and check if the elements are its subset

sA = set(list)
sE = set(elements)
check = sE <= sA

answered Mar 29 '17 at 09:43

blue_note

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score 0 · Answer 2 · answered Mar 29 '17 at 09:42

0

def b(list_of_b):
    A = ['X', 'Y', 'Z']
    for i in list_of_b:
        if i in A:
            return True
    return False
print(b(['X','Y']))

This may help Happy Coding

answered Mar 29 '17 at 09:42

Dev Jalla

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Check if only certain values exist in a list (Python)

2 Answers2