[Tutor] Replace nth item with single value in each nested list

[Alan Gauld]

On 14/05/2020 15:28, EK Esawi via Tutor wrote:
> If a=[[1,2],[4,5],[7,8],[3,6]] then the desired results would be  a=[[1,2],[4,5],[7,11],[3,11]]. 
> if possible via list comprehension

Why do you want to use a list comprehension? They are used for creating
new lists not modifying existing ones. It rather sounds like a homework
exercise - a bad homework exercise at that. We don't do homework for
you, although we can offer suggestions.

But trying to force this into a list comprehension when it doesn't
naturally fit is a strange request. It can be done but it wouldn't
be very idiomatic Python.

-- 
Alan G
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