How can I compare two lists in python and return not matches

Question

I would like to return values from both lists that not in the other one:

bar = [ 1,2,3,4,5 ]
foo = [ 1,2,3,6 ]

returnNotMatches( a,b )

would r

Answer 1

You could use a list comprehension and zip

''.join([i[0] for i in zip(a, a.lower()) if i[0] == i[1]])