Hello,
On Tue, 24 Nov 2020 19:36:03 +0000
"Mathew M. Noel via Python-ideas"
Python uses an index of -1 to index the last element in a list. Since -1 occurs before 0 we might think of the elements of the linear list are being bent into a circle making the last element occur before the 0th element. Consider a list with n elements: it would be perfectly reasonable to address the element 0 of the list using an index of n since n occurs after n-1 (if we assume that the list is bent into a circle). This feature can prove to be extremely useful.
No.
Consider the following example:
days_of_the_week = ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"]
It would be nice if
days_of_the_week[0]
is the same as
days_of_the_week[7]
is the same as
days_of_the_week[14] etc
In other words use modular indexing.
If you want to use modular indexing, do exactly that: days_of_the_week[7 % 7] days_of_the_week[14 % 7] days_of_the_week[foo % 7] As was already mentioned, you can even hide that behind a 'list' subclass. -- Best regards, Paul mailto:pmiscml@gmail.com