Avoid duplicate items Python

Question

I am having an issue with duplicate items in a list in python.

For example I have this list

i = ['hello', 'hi', 'bye', 'welcome', 'hi', 'bye']

I want to print every item once, even if it's duplicated print it once.

Is there any way to do it in python?

You can [remove duplicate items from the list](http://stackoverflow.com/questions/7961363/removing-duplicates-in-lists), of course. There are various other ways to print each item once. — Anderson Green, Nov 02 '16 at 03:46

score 1 · Accepted Answer · answered Nov 02 '16 at 03:46

1

If the order doesn't matters, then you can use a set:

print(set(i))

Otherwise you can do something like this:

seen = set()
for e in i:
    if e not in seen:
        print(e)
        seen.add(e)

answered Nov 02 '16 at 03:46

Francisco

1 Answers1