How can you eliminate duplicates from a list?

Question

I have this code:

 def lottery(s):
            return ''.join(x for x in s if x.isdigit()) or "One more run!"

Now when you print out the s, it only prints the numbers and when there are only letters, it prints "One more run". Everything up to this point is fine, although I also want it to not print duplicates. Meaning that when I put print(lottery(4443)) it only prints out 1 four and not the 3 of them.

Wasif · Answer 1 · 2020-11-23T16:06:40.550

1

Try a set() to eliminate duplicates (un-ordered) and back to list with sorted

def lottery(s):
            return ''.join(x for x in sorted(set(s)) if x.isdigit()) or "One more run!"

lottery('435435')

Orders are too crucial?

def lottery(s):
            return ''.join(x for x in dict.fromkeys(s) if x.isdigit()) or "One more run!"

lottery('435435')

edited Nov 23 '20 at 16:06

answered Nov 23 '20 at 16:03

Wasif

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Unless consistent order is important, you can use `list()` instead of `sorted()`. – Barmar Nov 23 '20 at 16:04
@Barmar check edits for `dict.fromkeys` – Wasif Nov 23 '20 at 16:06
Yes, solved, thank you! – Allen Chen Nov 23 '20 at 16:09
Why are you creating a dictionary? You can simply loop over the set: `for x in set(s)` – Barmar Nov 23 '20 at 16:18

How can you eliminate duplicates from a list?

1 Answers1