[Tutor] Duplicate items in list

[Manprit Singh]

Dear sir ,

I feel the use of the object() call is ok , while printing the elements of
the list without printing the consecutive duplicates .

lst = [3, 3, 5, 5, 5, 6, 6, 6, 5, 9, 3, 3, 3, 5, 5]
last = object()
for itm in lst:
     if itm != last:
...      print(itm)
...      last = itm

Here If the List is starting from None then it is more safer to take last =
object(). Need to know why it should not be preferred ? Any specific reason
?

Regards
Manprit Singh


On Sat, Oct 10, 2020 at 11:33 PM Dennis Lee Bieber <wlfraed at ix.netcom.com>
wrote:

> On Sat, 10 Oct 2020 11:23:29 +0100, Alan Gauld via Tutor <tutor at python.org
> >
> declaimed the following:
>
> >IMHO The best solution posted so far that does not use the
> >library is the one by Dennis Beiber (slightly modified for
> >clarity):
> >
>         Yeah -- I should have put more separation between the OP's "lst"
> and my
> use of "last". I used the object() call just to guard against a data set
> that started with a None itself -- which was likely being overly cautious
> for the given problem description...
>
>
> --
>         Wulfraed                 Dennis Lee Bieber         AF6VN
>         wlfraed at ix.netcom.com
> http://wlfraed.microdiversity.freeddns.org/
>
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