Python - Matching

Question

a = ('one', 'two')
b = ('ten', 'ten')

z = [('four', 'five', 'six'), ('one', 'two', 'twenty')]

I'm trying 1) see if the first two elements in my tuples (a, or b, for example), match up with the first two elements in my list of tuples (z). 2)if there is a match, I want to return the third element of the tuple

so i want to get

myFunc(a,z) -> 'twenty'
myFunc(b,z) -> None

Answer 1

Using generator expression, and next:

>>> a = ('one', 'two')
>>> b = ('ten', 'ten')
>>> z = [('four', 'five', 'six'), ('one', 'two', 'twenty')]
>>> next((x[2] for x in z if x[:2] == a), None)
'twenty'
>>> next((x[2] for x in z if x[:2] == b), None)
>>>