Creating a List and Removing Duplicates in Python

Question

I am creating a list in Python using .split. My code splits the user's input into a list. I am wondering on how I can stop the program printing duplicates of the word in the sentence. My code is currently this:

sentence = input("Enter a sentence").lower()
sentencesplit = sentence.split()
print(sentencesplit)

When I enter "Run run Forrest run" it will return:

['run', 'run', 'Forrest', 'run']

But I want it to return only run and Forrest, I want it to only list the same word once. Does anyone know a way of doing this? I need to keep the order, so the question's similar to this do not help me, so don't mark this a duplicate, just leave and move on with your life.

Thanks, Izaak

Yes, it is a duplicate. Please actually read through that page. — TigerhawkT3, Dec 06 '16 at 10:34
Yes it is. That question has _twenty-four answers_, and the _very second one_ provides a solution that maintains the original ordering. — TigerhawkT3, Dec 14 '16 at 10:31

score 2 · Answer 1 · answered Dec 06 '16 at 10:27

2

You can use a set:

list(set(sentencesplit))

answered Dec 06 '16 at 10:27

Martinbaste

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if order of the words is not important.. – Elan Dec 06 '16 at 10:28

blue_note · Answer 2 · 2016-12-06T10:35:22.387

-1

mylist = [word for word in mylist if mylist.count(word) == 1]

edited Dec 06 '16 at 10:35

answered Dec 06 '16 at 10:28

blue_note

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Missing a final `]`. – wildwilhelm Dec 06 '16 at 10:35
While this is a valid answer, it is very inefficient compared to the alternatives – Chris_Rands Dec 06 '16 at 12:40
the proposed alternatives don't ignore order of words – blue_note Dec 06 '16 at 13:12

Creating a List and Removing Duplicates in Python

2 Answers2