[Tutor] removing items from list in for loop

[Joel Goldstick]

On Sun, Feb 13, 2022 at 2:55 AM <marcus.luetolf at bluewin.ch> wrote:
>
> Hello Experts, I am still trying to
>
> create from a list of n items, n copies of this list in a for loop with one
> item successivly removed at each iteration.
>
> I should get n copies each with n-1 items.
>
>
>
> Beeing aware of problems arising when a list is alterated during an
> iteration I tried to get around using a copy oft he original list.
>
> However I got strange results, the copied list getting shorter at each
> iteration or the items didn't got removed in order.
>
>
>
> For example In my last attempt below item1 was never removed and I can't
> understand what happens to the indexing:
>
>
>
> >all_items = ['item1 ','item2 ', 'item3 ',' item4 ', 'item5 ','item6 ',
> 'item7', 'item8', 'item9', 'item10 ']
>
>
>
> >copy_all_items = ['item1 ','item2 ', 'item3 ',' item4 ', 'item5 ','item6 ',
> 'item7', 'item8', 'item9', 'item10 ']
>
>
>
> >for item in copy_all_items:
>
>     >copy_all_items.remove(item)
>
>     >copy_all_items = all_items
>
>     >print(item, copy_all_items)
>
>
>
>
>
> I'd really appreciate to learn my mistake, thank you.
>
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-- 
Joel Goldstick