remove duplicates some value from 2 lists

Question

I want to remove duplicate values from the two list. The expected input and output are shown below:

firstList = [['i-am1', 'apple'], ['i-am2', 'orange']]

secondList = [['i-am1', 'apple', 'asks'], ['i-am2', 'orange', 'last one'], ['i-am3', 'banana', 'test ok']]

result = [['i-am3', 'banana', 'test ok']]

I tried using set() and it doesn't not work.

sumfirstList = set(map(tuple, firstList))
sumsecondList = set(map(tuple, secondList))
result_all = set(sumfirstList) ^ set(sumsecondList)

Answer 1

You could filter based on slice

l = list(filter(lambda x: x[:2] not in firstList, secondList))
# [['i-am3', 'banana', 'test ok']]