Question

I just want to know why this doesn’t work
(I am trying to name the ducklings from a book: Jack, Kack, Lack, Mack, Nack, Ouack, Pack, Quack) Note: Quack and Ouack have a U

prefixes = 'JKLMNOPQ'
suffix = 'ack'

for letter in prefixes:
    if letter != 'O' or 'Q':      #I know this doesn't work, need to know alternative
        print letter + suffix
    else:
        print letter + 'u' + suffix

Answer 1

You likely mean this:

if letter != 'O' or letter != 'Q':

The result of your original statement,

if letter != 'O' or 'Q':

compared letter to the result of 'O' or 'Q', which is a boolean (true to be exact) (so you could see why this comparison would always be true as it was).