Question

How to find the common elements in list of lists in Python

Answer 1

a_list = [['aaa', 'ddd', 'eee', 'hhh'],
          ['bbb', 'aaa', 'fff', 'ggg', 'eee', 'iii'],
          ['www', 'eee', 'aaa']]

the_sets = map(set, a_list)

common_items = set.intersection(*the_sets)

print(common_items)


'''
run:

{'aaa', 'eee'}

'''

 

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Answer 2

a_list = [['aaa', 'ddd', 'eee', 'hhh'],
          ['bbb', 'aaa', 'fff', 'ggg', 'eee', 'iii'],
          ['www', 'eee', 'aaa']]

common_items = set.intersection(*map(set, a_list))

print(common_items)


'''
run:

{'aaa', 'eee'}

'''

 

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Answer 3

a_list = [['aaa', 'ddd', 'eee', 'hhh'],
          ['bbb', 'aaa', 'fff', 'ggg', 'eee', 'iii'],
          ['www', 'eee', 'aaa']]

common_items = set(a_list[0]).intersection(*a_list[1:])

print(common_items)


'''
run:

{'aaa', 'eee'}

'''

 

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Answer 4

a_list = [['aaa', 'ddd', 'eee', 'hhh'],
          ['bbb', 'aaa', 'fff', 'ggg', 'eee', 'iii'],
          ['www', 'eee', 'aaa']]

common_items = set(a_list[0]).intersection(*a_list)

print(common_items)


'''
run:

{'aaa', 'eee'}

'''

 

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