I want to compare 2 iterables and print the items which appear in both iterables.
>>> a = ('q', 'r')
>>> b = ('q')
# Iterate over a. If y not in b, print y.
# I want to see ['r'] printed.
>>> print([ y if y not in b for y in a])
But it gives me an invalid syntax error where the ^ has been placed. What is wrong about this lambda function?