pythonScope errorEasy

Result variable never exists when nothing matches

Time: 0:00

What it should do

last_even(nums) should return the last even number, or -1 if there are none. last_even([1, 3]) should return -1.

What goes wrong

last_even([1, 3]) raises UnboundLocalError: cannot access local variable 'found'. It works fine when the list contains an even number.

Hints

This is a scope and closure bugs bug

Every callback reports the last value, a counter never increments, UnboundLocalError on a variable you can see.