How to remove the same words from two lists?

Question

I have two lists that I want to remove the same words from the lists. I use this code but it doesn't work:

a = ['go ing', 'watch TV', 'ice cream', 'sit ting', 'note book']
b = ['go ing', 'watching TV', 'ice cream', 'sit ing', 'notebook']

if a[i] == b[i]:
    try:
        a.remove(i)
        b.remove(i)
    except:
        pass

My desired output is a = ['watch TV', 'sit ting', 'note book'] . Could anyone help me?

Answer 1

First of all your answer seems unclear to me, but I guess you want to do this

a = ['go ing','watch TV', 'ice cream','sit ting','note book']
b = ['go ing','watching TV','ice cream','sit ing','notebook']

set(a).intersection(set(b))
>>> {'go ing', 'ice cream'}

set(a).difference(set(b))
>>> {'sit ting', 'watch TV', 'note book'}

You can use Set to perform operations like Difference, Intersection, Union, Symmetric Difference, etc.