Finding intersection/difference between python lists

Question

I have two python lists:

a = [(\'when\', 3), (\'why\', 4), (\'throw\', 9), (\'send\', 15), (\'you\', 1)]

b = [\'the\', \'when\', \'send\', \'we\', \'us\']
<         


        

Answer 1

A list comprehension will work.

a = [('when', 3), ('why', 4), ('throw', 9), ('send', 15), ('you', 1)]
b = ['the', 'when', 'send', 'we', 'us']
filtered = [i for i in a if not i[0] in b]

>>>print(filtered)
[('why', 4), ('throw', 9), ('you', 1)]