CODEWITHSUNDEEP
pythonlistcount
user2741700
user2741700

Reputation: 901

count over several List

I have many Python lists filled with words and among those words I would like to keep the ones who appears in at least two lists.

My first guess was to collapse all those list into a big one and then to keep the words who have a count > 1.

The problem is that I have some memory issue when I try to collapse all the list into a big one.

Any help please ? thanks a lot

Upvotes: 0

Views: 49

Answers (1)

roippi
roippi

Reputation: 25954

If you're counting things, use a counter!

from collections import Counter

c = Counter(['bob','steve','steve','joe'])

# c == Counter({'steve': 2, 'bob': 1, 'joe': 1})

c.update(['alan','jose','steve'])

# c == Counter({'steve': 3, 'jose': 1, 'bob': 1, 'joe': 1, 'alan': 1})

Upvotes: 3

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